Transmigrated into the prince's only daughter, and beat up the dignitaries in the capital with

In the morning,

The east wing of the courtyard was decorated to look like a hall.

The snow in the courtyard had been cleared, and ice crystals hung on the pines and cypresses. The door to the main room was tightly closed, and there was a faint aroma of medicinal herbs wafting in.

The east wing has the best lighting. The morning sun shines through the window paper and shines on the desk.

There were three desks in the room, large and small, equipped with the best pens, inkstones, and paper. Even the pen holder on Jiang An's small desk was gilded.

Sitting in the upper seat was Hu Yan, dressed in a green shirt. He held a scroll in one hand and a decorative ruler on his right.

The man was handsome and had a scholarly air. Even when he was sitting, his back was straight.

The two little ones in front of him, one was brought here by his mother and had not figured out the situation yet, and the other was lying on the table, yawning listlessly.

Huo Changming looked at the unfamiliar furnishings in the room, at Uncle Hu who had suddenly become his teacher, and then at his sister who was also sitting next to him.

I still don’t understand why I was forced to go to school again when I was just staying at home and enjoying my rest.

Huo Changming: So, why am I here?

The dumpling next to him rubbed his eyes with his fat hands, hiding his merits and fame~

She skillfully took out the Thousand Characters Calligraphy Copybook from her cloth bag. Tuanzi took a deep breath and rubbed her cheeks with her chubby hands, trying to wake herself up.

Hu Yan coughed twice. After a night's rest, his complexion was much better than yesterday.

"The New Year is coming, and the Lantern Festival will be here soon, so I won't teach you anything new..."

"Eternal Light..."

Huo Changming, who was called, stood up straight. The silly young master pricked up his ears and said, "I'm here, Teacher Hu..."

Hu Yan smiled gently, his fox eyes were very peaceful, "Have you memorized all the books?"

This fatal problem...

Jiang An silently used the calligraphy to cover his fat face, can’t see me…can’t see me…

Huo Changming was stunned and whispered: "Teacher, no..."

Hu Yanke was not angry. After all, Changming was much better than his father!

"What about mathematics?"

Huo Changming: "...still...ok?"

If I can settle the bill when I go out to buy something, it should be OK, right?

"Then you will learn mathematics today,"

Hu Yan turned his head, his fox eyes bent, looking at Tuanzi who was trying to hide himself.

"Miss?"

Jiang An poked his head out from behind the calligraphy and smiled, "Military Advisor, you are so polite. Just call me An An~"

This little rascal!

Hu Yan cursed in his heart, but looked unconvinced, "So how far has An An learned the Thousand Character Classic?"

He joked, "If there is an illiterate student in Chongzhou Prefecture during the Lantern Festival parade, given the old teacher's personality, he would probably be so angry that he would faint..."

Jiang An's eyes widened, his fat paws smeared on the copybook, and he was anxious to defend himself, "An An can recognize it all!"

Are you kidding? Her IQ is 180!

Facing the old fox's surprised gaze, Tuanzi raised his paw, feeling very aggrieved, "I just... I just can't write..."

"The brush is so soft and hard to use!"

"It's all Bi's fault, not An'an's!"

Instead of making things difficult for yourself, blame others.

Huo Changming raised his hand, "Really! Sister An An knows it, and the teacher even praised her!"

Tuanzi nodded proudly, that’s right!

Hu Yan's fox eyes flashed with surprise, and he stood up and walked to Jiang An.

He casually pointed to a sentence on the calligraphy and asked, "What does this mean?"

Jiang An glanced at the line of flamboyantly written characters on the calligraphy and blinked his eyes.

Tuanzi's voice was childish, he spoke slowly, and his pronunciation was clear. "He studied well and became an official. He took up a post and worked in politics. He kept the sweet tangerine tree and left to chant more."

"The Master said that if you learn well, you can take the imperial examination and become an official. If you are a good official while you are alive, the people will not scold you when you die!"

Facing Tuanzi's eyes that said "please praise me", Hu Yan's eyes twitched.

This explanation is not wrong, it's just too plain...

Hu Yan: "Well, An An is amazing!"

Tuanzi: Hey hey~

Then, he picked out a few more sentences to test Tuanzi.

Jiang An sat on the cushion, the hair on his head moving with it as he shook his head. He read the sentence word for word and explained it in plain language.

The meaning is correct, but why does it always sound so confusing when it comes out of Tuanzi's mouth?

It took Jiang An only a little over a month from the time he completed the ceremony of becoming a disciple to the time he followed the old master to study in the classroom!

After more than a month, I could recognize the Thousand Character Classic...

Hu Yan's fox eyes were bright, and he looked at Jiang An as if he saw a rough jade. In his heart, he felt that this old man was really tight-lipped. He had such a little prodigy, but he didn't say a word!

He stood up with a normal expression, and glanced at the elated Huo Changming with his fox eyes. He said in a light voice, "Changming, have you mastered mathematics?"

Don't read the book properly, just watch the fun!

Huo Changming pursed his lips, and leaned his round body over the table.

I’m still studying! I’m still studying!

The satisfied Mr. Hu stood with his hands behind his back, looking back and forth between the two dumplings.

One was holding the brush in his fat paw, trying to tame the wild brush;

One was scratching his head, wishing he could use his hands and feet to count...

Hu Yan looked at the dark words on the rice paper in front of Jiang An and closed his eyes.

He looked at the neat math problem in front of Huo Changming and took a deep breath.

He covered his face with his hands, and suddenly wanted Sun Bo to feel his pulse again. He felt that he would not live long this time...

He walked behind Tuanzi again, put his big hand on the fat paw, grabbed Jiang An's hand and wrote a word on the rice paper.

"The tip of the brush is soft, so don't press hard when you write. When the tip of the brush touches the paper, apply appropriate pressure where it stops..."

After a few strokes, a character with a sense of elegance and grace appeared on the paper.

Master Hu let go of his hand and said, "An An, copy it again."

Jiang An was given high hopes. He nodded heavily and wrote slowly with a stern face. Even Huo Changming stretched his neck to see.

Sister An An’s handwriting has often made the old teacher in school so angry that he was speechless!

After a moment, Hu Yan looked at the spot on the rice paper and his mouth twitched.

It's already pretty good, at least I can tell it's a word. As a child prodigy, there's always one thing he's not good at, but that's normal, normal...

After comforting himself, Hu Yan walked towards Huo Changming, pointing the ruler in his hand at the question on the paper, and his clear voice resounded through the room.

"Now there is an object whose number is unknown. When you count four by four, there are two left. When you count five by five, there are two left. When you count seven by seven, there are two left. How many of these objects are there?"

"Changming, you have been looking at this problem for half an hour. Do you have a solution?"

Huo Changming nodded, "Teacher, it's almost done... almost done..."

Hu Yan: It’s almost there, I’m almost there…

Tuanzi, who was standing by, heard this question, stopped taming the pen in his hand, and tilted his head. Isn't this a math problem?

Her round eyes sparkled, and she grabbed the written rice paper with her fat paws and threw it behind her, then wrote a big 'X' on the clean rice paper.

Then...the clean rice paper turned into a black mass again.

Jiang An raised his equally dark fat hand, "One hundred and forty-two!!"

Hu Yan paused, and looked at the happy Tuanzi together with Huo Changming.

This question was written by him and was taken from "Sun Zi's Mathematical Classic". Taking Changming's age into consideration, he deliberately made it simpler. The answer is exactly one hundred and forty-two!

"How do you calculate that?"

Tuanzi's paws were stuck on the rice paper, leaving black handprints, and he said proudly, "It counts!"

Hu Yan's eyes fell on the paper and he frowned. There was only a dark mass...

Hu Yan thought about it, and then gave Tuanzi another math problem to solve.

"Now there is a wall ten feet thick, and two rats are facing each other to dig a hole. The big rat digs one foot a day, and the small rat also digs one foot a day. The big rat doubles its thickness each day, and the small rat halves its thickness each day. Ask: When will they meet? How much will each rat dig?"

(From: Nine Chapters on the Mathematical Art)

Jiang An tilted his head in confusion, and his sincere eyes met Hu Yan's expectant gaze.

Tuanzi shook his head, "I don't understand..."

What is the Japanese self-multiplier system? What is the self-half system?