Daqin started with offering immortal medicine

Although more than a month has passed since the last incident, Zhang Cang still remembers the arithmetic, 610, multiplied by 120.

Li Yang calculated the result in an instant, seventy-three thousand two hundred, and it took him several times longer than the other party to calculate it.

For Zhang Cang, who claims to have a unique talent in mathematical calculations, this matter has troubled him for a full month.

He wanted too much to know why.

Seeing Zhang Cang staring at him with bewilderment, Li Yang couldn't help but smile, stretched out a finger and said, "Vertical!"

1 Chapter [-] Promotion of Mathematics for Later Generations

"Vertical!"

Zhang Cang frowned. As expected, he had never heard of this calculation method, so he couldn't help but feel more curious.

"That's right, Jian Shi, I made the vertical formula in my mind, so the calculation is faster." Li Yang smiled.

When he was in Pei County, ever since he saw merchants using calculation methods, Li Yang originally thought that this ancient person did not know multiplication formulas, so he thought that he could calculate faster than Zhang Cang because of multiplication formulas.

However, until a few days ago, Li Yang wanted to learn about the preliminary calculations of today's mathematics because of the compilation of mathematics textbooks, and he was surprised to find that the multiplication formulas had already been popular.

The ninety-nine multiplication table in my country originated very early, at least as early as the Spring and Autumn Period when Duke Huan of Lu had ninety-nine. It was written in "Guanzi" during the Spring and Autumn Period and the Warring States Period.In the Warring States period, the nine-nine formula was quite popular, and in the Qin Dynasty today, anyone who knows how to read and write can memorize the nine-nine multiplication table by heart.

Moreover, in the addition at this time, I also saw the words "half and half into one". Isn't this the meaning of 0.5+0.5=1, which means that at this time, there are already points.

This really surprised Li Yang.

At the same time, I am also very puzzled, why with the multiplication formula, in Peixian last time, not only the businessman can't count himself, but even the mathematician Zhang Cang of this era can't count himself?

After careful study, Li Yang finally realized that the reason for this was the vertical style.

Yes, it is the vertical formula listed in the draft book for later generations' calculations.

Addition vertical, subtraction vertical, multiplication vertical, division vertical.

Because of these vertical formulas, no matter how many digits it is, we can easily calculate it with vertical formulas.

However, in this era, there is no vertical style.

They can't use a pen to write a vertical formula on paper, and then calculate it.Instead, it is necessary to use calculation chips, place them on the ground, and calculate on the table, so it is called calculation.

This is why although they memorize multiplication formulas by heart, it is still difficult for them to calculate the formula of multiplying three-digit numbers by three-digit numbers.

As a traveler of later generations, although Li Yang used mental arithmetic and did not list the vertical formula on the draft paper, he did the vertical formula in his mind, so he calculated it quickly.

Therefore, as long as the vertical formula is taught to people of this era, their computing power can be improved almost instantly.

In order to let Zhang Cang know at a glance what the vertical calculation method is.

Li Yang didn't waste too much nonsense, he directly took a piece of paper, and then listed the vertical formula of the formula in Pei County on the paper.

It's just that Li Yang looked a little awkward with the vertical form on the paper, because they are not Arabic numerals, but Xiaozhuan (there is a saying that ancient Chinese numerals used special pictographic symbols, until Roman numerals were later passed on) , only use Roman symbols such as Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ, Ⅵ, Ⅶ... to replace numbers.).

Fortunately, this does not affect the vertical operation.

According to the multiplication formula, Li Yang explained to Zhang Cang, and soon, Li Yang calculated the result under the vertical formula.

Zhang Cang is a mathematician of this era. He has a talent for mathematics that no one else has. So after watching Li Yang's entire calculation process, Zhang Cang was stunned and opened his mouth wide. Li Yang was astonished!

You don’t need to use a single calculation chip, you can directly arrange two sets of numbers on the paper or on the ground correspondingly, and use the multiplication formula to calculate it easily. For Zhang Cang, this kind of calculation method is simply shocking. soul!

"This vertical method is simple, fast, and incomparably exquisite! My lord, I have been taught today!"

Zhang Cang was so excited, his eyes lit up, he quickly bowed his hands to Li Yang, and bowed deeply.

Li Yang smiled and said, "There are more!"

After speaking, Li Yang used the vertical calculation method on the paper to calculate several multi-digit addition, subtraction, and division calculations, directly making Zhang Cang look stupid.

As a mathematician, after seeing the vertical calculations of addition, subtraction, multiplication and division, he knows that there is no need to calculate chips in future calculations!

Moreover, after listing this vertically, even people with poor brains can easily and quickly calculate the results of multi-digit addition, subtraction, multiplication and division.

In other words, as long as this vertical calculation method is implemented, it will benefit countless people.

In the future, even an old farmer can easily solve addition and subtraction as long as he learns the method of vertical arithmetic a few times.

Zhang Cang, who was amazed again and again, raised his head and asked excitedly: "My lord, did you invent this vertical calculation method?"

Li Yang said bluntly: "This is a calculation method that I mastered when I was a child."

"My lord is saying, this...was invented when you were young?" Zhang Cang was stunned!

"This……"

Li Yang was taken aback, and realized that he had misunderstood him, but when he thought about it, there was no such calculation method at this time, and it seemed difficult to explain.

So I had no choice but to nod shamelessly: "Well, you are right, this is what I realized when I was a child!"

hiss!

"..." Zhang Cang took a deep breath, he was so shocked that he couldn't even speak.

My goodness!

Prime Minister Zhong unexpectedly comprehended such an exquisite calculation method when he was a child...

Genius, what a mathematical genius!

I thought that I could be regarded as a mathematical genius in the world, but I didn't realize it...

Now compared with Prime Minister Zhong, I am a scumbag!

Even Prime Minister Lian Zhong left him thousands of miles away when he was a child.

At this moment, Zhang Cang looked at Li Yang with incomparable admiration, and he was shocked!

Knowing how to calculate difficult problems can only show that you are smart at best.

However, being able to invent an advanced calculation method is not just smart, it's not at the same level at all.

Since the Warring States period, calculation has been regarded as a magic weapon by the world.

But now it seems that compared with Li Yang's vertical calculation, the calculation is also scum.

At the moment, Zhang Cang sighed without being excited: "In today's world, the only one who dares to be called a master of mathematics is the Prime Minister!"

"........."