Tiantang Splendid

Chapter 90 Arabic Numerals

On the white rice paper, crisscrossed lines were drawn, and a three-dimensional figure was drawn. It seemed to be a cuboid, but it was not complete. One-third of it seemed to have been cut with a knife, revealing the tortuous interior.

What is this?
Then, he saw the note on the paper.

Kang noodles, flues, dog holes...

It's actually a drawing of a heated kang?But I have never seen such a complicated heated kang...

Li Chunfeng was fascinated by it. He found that this kind of picture was a form of expression that he had never seen before. With just a few strokes, it actually clearly showed the inner and outer structure of the whole kang in front of his eyes.This is just a heated kang. If this method of drawing is applied to the building of a large palace, wouldn’t it be more clear and all the building steps and effects are displayed?

The more Li Chunfeng thought about this picture, the more interesting it became, and then he saw the tadpole-like text next to the figure.

Look carefully, never seen before.

Li Chunfeng prides himself on being pedantic and well-informed, but this kind of novel font has never been seen before, and he will not think that Fang Jun is idle and has nothing to do with ghosts on drawings...

"What word is this?"

Li Chunfeng pointed to the tadpole and asked.

Fang Jun looked at it and said casually, "Arabian..." He suddenly woke up and kept his mouth shut.

What he wrote was actually a calculation method of how much material is needed for Panyipu Kang, but these are Arabic numerals. Did the Tang Dynasty have them?
Certainly not!
If Li Chunfeng asked, "How did you know that?", how would he answer?

Sure enough, Li Chunfeng asked suspiciously: "Arabic? Caliphate seems to have another name, but what does this have to do with Caliphate? The language of Caliphate is not like this."

Fang Jun wanted to give himself a mouth.What he is most afraid of is to "reveal the stuff" in front of Li Chunfeng, and as a result, he accidentally digs a hole for himself. He is really afraid of whatever...

Looking at Li Chunfeng's eyes full of curiosity, Fang Jun knew that it was impossible not to say anything.

He hurriedly said, "A certain learned this from a cannibal. He said what Arabic numerals are called, but it was actually invented by the Tianzhu people, so it's easy to calculate."

Li Chunfeng didn't doubt him, but in fact he didn't care where the word came from, he was just interested in those formulas. Although he couldn't understand it, he thought it was very powerful...

"Can you tell me about Pindao?"

Li Chunfeng pointed to the "+", "-", "×" and "÷" formulas and asked.

Fang Jun had no choice but to bite the bullet and explain a simple algorithm for adding, subtracting, multiplying and dividing ten Arabic numbers.

Li Chunfeng listened attentively for a long time, shook his head and said, "It's a novelty, but that's all, it's not much better than our algorithm... Hey! No!"

Suddenly exclaimed, thought about it carefully, and said in surprise: "This number is easy to write, I didn't think it was very good at first, but the more complicated numbers are involved, the easier it is to calculate! It's a genius idea..."

He immediately took Fang Jun's "pencil" and wrote and drew on the paper.

He wrote the addition of two large numbers, listed the formula to quickly calculate the result, then listed the two numbers to multiply, and laid out the multiplication formula, and was immediately pleasantly surprised: "Without the calculation, it is still so convenient. The result is good, good!"

Are you still using it?Would you like to take out the abacus and shock you again... Fang Jun thought to himself.

Of course, I just think about it, but I don't dare to do more...

Li Chunfeng said with admiration, "I've never heard of such a simple number before. I'm ashamed and ashamed... From now on, the poor can be relieved."

Fang Jun thought so.

Li Chunfeng was the imperial edict, in charge of the revision of the calendar, in other words, an astronomer.Astronomy needs to deal with a large number of data operations, so in ancient and modern China and abroad, any astronomer must be a mathematician with a considerable level.

No wonder Li Chunfeng obtained this "Arabic numeral" like a treasure.

After studying for a while, Li Chunfeng happily took Fang Jun's blueprint and left, even delaying Fang Jun's fake stay.

After Li Chunfeng left, Fang Jun suddenly remembered something.

This Niubi came today, it must be for the sake of the poem last night. He wanted to recite it casually at that time, but he didn't really hear it, so he came to ask for the whole word.At this moment, I temporarily forgot about this because of the Arabic numerals. When I think about it when I get home, won't I come back to the door again?

Fang Jun had a headache when he saw Li Chunfeng, a half-immortal. He quickly trotted back to the study, swiped his ink in one go, copied down the entire song "Qing Ping Le", and ordered the servant to catch up with Li Chunfeng and send it to him.

This bull nose will not come again in the future, will it?

Fang Jun let out a sigh, got on the bench, took a sip from the tea cup, but suddenly jumped up!
Done!

I was in a hurry just now, and I just wanted to get rid of Niubi quickly, but I used the "Zhao Ti" that I used to transcribe that poem...

That guy won't look at "Zhao Tizi" again, and will come back to "seek advice" again?

Fang Jun sweated on his forehead, and immediately shouted: "When Niubi comes back, he will say that he is going to retreat, and no one will be seen!"

Immediately packed up and ran to the blacksmith shop in the back mountain...

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(End of this chapter)