I really didn't want to practice immortality at Hogwarts

Zhang Chun was discovered by other students halfway through his lecture on the history of human civilization.

Fred, George and Lee Jordan, who were sitting at a big table with Harry, were originally discussing how to use magic to increase their age so as to deceive the Goblet of Fire. However, after a while, they were stopped by Zhang Chun's talk They were constantly attracted and gathered around to watch the fun.

Seeing his brother Ron speechless, his face turning blue and white, Fred couldn't help but said, "Hi, Zhang. You mean you are good at math, right?"

"Would you like to compete? It's math." George followed suit.

At this time, more and more people came to watch the excitement.Not only Gryffindor students, but also many from other houses came to watch the fun.

Zhang Chun looked around calmly, looked at everyone, and said in a deep voice, "Okay. But I think it needs to be one-on-one..."

"No problem!" Fred shouted, waving to other students, "I'll go first."

"Wait...that's not what I meant." Zhang Chun quickly waved his hand, "I mean, I am facing a group of you by myself... Come on, come up with the questions, you can do whatever you want."

Everyone is confused. It’s the first time I heard that one-on-one is one person versus a group.Speaking of which, Zhang Chun, the transfer student, is simply too arrogant.

"You can say whatever you want about multiplication within ten. If I can't answer it within two seconds, I lose..." Seeing that the students gathered around had nothing to say, Zhang Chun set the question for himself first.He planned to use multiplication as an appetizer for this later generation of British people who were least accustomed to Eastern mathematics.

"What does this mean? I can tell you the answer to addition within ten seconds in two seconds..." Fred said.

"No, Zhang is talking about multiplication within ten..." Li Jordan quickly stopped him.

"...Is it multiplication? How is it possible..." Fred was confused.

"Then we'll have a question!" George said rudely, staring into Zhang Chun's eyes.

"Please..."

"7 times 9..."

"63!" Before George could finish speaking, Zhang Chun opened his mouth.

"5 times 8!"

"40."

"9 times 9!!"

"81."

……

There was no stumbling at all. Almost as soon as George asked his question, Zhang Chun gave the answer immediately.

There are a bunch of people around with such dark faces...

Zhang Chun was constantly receiving negative emotional points from his classmates.

"No, this is too simple. Can it be more complicated?" Fred asked.

"Let me try……"

"18 times 11!" George shouted.

"198." Zhang Chun's answer was only half a beat.

"432x5!" shouted a Hufflepuff next to him.

"Add a zero at the end of 432 and divide it by 2. The answer is 2160!" This time Zhang Chun even explained the calculation process.

omg...

The people around him were even less calm.These were super complicated questions for them, and this guy from the East actually gave the answers casually!

"1, add 2, add 3...all the way to 100!" Lee Jordan was even more ruthless.

"5050...Oh, this is too simple." Zhang Chun answered faster this time.

The negative emotions from the onlookers are flooding the screen in Zhang Chun's system...

Seeing Hermione open her mouth, she was about to speak.Zhang Chun choked her back with one sentence, "Gauss is also German..."

"The negative emotion value from Hermione is +222..."

Zhang Chun smiled faintly and counted the negative emotion values ​​​​contributed by the people around him in the system, thinking to himself, are you stupid?I don’t know if I studied the Elementary School Math Olympiad in my previous life...

Just when everyone was dead silent, Cedric Diggory, Hufflepuff's prefect, walked in.

"Why don't you go to class?" Cedric said.

The prefect of Ravenclaw, Penelope Crevat, explained the situation to him in a low voice. Cedric, as the top student at Hogwarts, was very unconvinced.

"Listen, Mr. Zhang. This doesn't mean anything... Mathematics is just a basic subject. Besides, these math problems are not difficult, even I can answer them..." Cedric said.

"You misunderstood... I think other students also misunderstood." Zhang Chun smiled, "Individual mathematical ability is not used to prove anything. As the twins said, we are just playing a small game. It cannot be Represent me or the country I represent, or the merits of your country. It's just a small competition...don't feel any hostility towards me for this."

Cedric shook his head, "No, when there is competition, there are winners and losers. I cannot allow you to stand in the middle of the Hogwarts hall with such arrogance. Our Hogwarts is..."

"Hey, I'm also a student at Hogwarts. I'm a Gryffindor, lion, gold and red (the representative of Gryffindor is a lion, and the flag colors are gold and red), right?" Zhang Chun protest. "It's a game between students."

"...Okay. But..." Cedric had just thought of a bunch of words, but he choked back when Zhang Chun said, "I am also a student of Hogwarts."

"Okay then, you come up with a question. Addition and subtraction of more than seven digits. You can name any number..." Zhang Chun knew clearly that Cedric wanted to be in the limelight.

It seems that it's not enough to suppress him without any real effort.

"...Are you sure?" Cedric's eyes were sharp.

The students around him exclaimed in low voices.

Addition and subtraction of more than seven digits can be said casually, which is beyond the mathematical limits of the magical world that ordinary adult wizards can master.

"Please!" Zhang Chun said firmly.

"Okay! +-+-..." Cedric began to ask questions.

"Speak slowly...I'm recording..." Lee Jordan quickly recorded Cedric's question.

Although the students from various colleges around him knew that this was just a game, the new transfer students were a little alienated from him after all. At this time, they didn't care about which college they were from, and they all hoped that Cedric could win the game for them.

It seemed like a long, long time before Cedric finished adding and subtracting eight items with seven digits or more.

Everyone looked at Zhang Chun and saw that his face was slightly closed, his hands were moving virtually in the air, as if he were playing music, and his lips were trembling rapidly, as if he was reciting some spell...

After about seven or eight seconds, Zhang Chun opened his eyes, raised his head, and looked at everyone proudly, "The answer is!"

The people around him were petrified.

Is this true?How could he solve such a difficult question just by relying on mental calculations?

No one knew the answer, not even Cedric who asked the question.But looking at Zhang Chun's confident look... the onlookers felt that the answer might really be what he said...

"Calculate slowly, but the answer is definitely this!" Zhang Chun smiled slightly and watched the twins, Li Qiaodan and several senior classmates holding parchments and working together to calculate the answer, indicating that they were not in a hurry.

Zhang Chunxin said, fortunately, I learned abacus mental arithmetic for a few days in my previous life. If I hadn’t been able to control you all...

Seeing the negative emotions from the onlookers rushing upwards, he felt so happy...

Cedric took a few steps with a sullen face, looked down at Zhang Chun, and said in a deep voice, "I'm warning you! Don't try to make a show of yourself here, make alarmist remarks in the halls of Hogwarts, and use Muggle mathematics. ……You will regret this!"

Zhang Chun stood up, met Cedric's eyes without fear, and said resolutely, "Do you think I am trying to show off?"

Cedric pursed his lips and said nothing.

Zhang Chun turned to look at the other students who were watching, spread out his hands, and said with a serious face, "Do you all think that I am trying to show off?"

Everyone looks at me and I look at you, we all look confused.

Is there any profound meaning behind Zhang Chun's behavior?

Zhang Chun looked at everyone again, shook his head, and smiled, "I am really showing off... Okay, let's go to class. Students, don't be late for the first class of this semester."

After speaking, Zhang Chun turned around and left...

The surrounding students all fell down...

Zhang Chun, who was walking on the road, looked at the +999 negative emotion value flying by in the system, and thought to himself.

——Thanks to the veterans for the big rocket...

After Zhang Chun left, a circle of classmates were still confused.At this time, Lee Jordan raised his head from the parchment, looked at them absently and said, "The answer is really..."