Plow the soil and dig boundary stone pits. The river beach is sandy soil, which is not hard, so it is easier to dig.

However, Li Mengxi was clumsily digging with the hoe, making Liu Guanzhang and the farmer next to him laugh.

Finally, Zhang Fei couldn't stand it any longer and couldn't stand Li Mengxi's clumsiness. He grabbed the hoe with his hands and dug a hole with two clicks.

Li Mengxi looked around.

If a boundary stone is left on the left side of an acre of land, then the boundary stone should also be left on the left side of the next acre of land.

In other words, there is no need to leave boundary stones at all four corners of the land.

Li Mengxi took a pen, ink and inkstone and wrote a few words on the green bricks.

After finishing writing, Li Mengxi was stunned.

Liu Guanzhang was also stunned when he saw Li Mengxi writing.

Because what Li Mengxi casually wrote down were the three numbers 001.

That is, circles and verticals.

Realizing that there was an error in his writing, Li Mengxi turned around and looked at the three people in front of him, Liu, Guan, and Zhang, "This master's secret counting method!" Li Mengxi pretended to be mysterious.

It's easy to calculate, and it's a vague explanation.

Then, Li Mengxi took the bricks with the numbers written on them and buried them in the ground.

He also had to write another number plate on the bamboo. Simply, Li Mengxi made the mistake and wrote the number on the bamboo too.

After writing the numbers on the bamboo piece that was half the size of a palm, Li Mengxi called the civilian husband over and handed the bamboo plaque into the civilian husband's hand.

Li Mengxi said, "Uncle, this is your land number, take it." Li Mengxi pointed to the green bricks at the end of the field, "Remember, the number on the bricks facing the number on the bamboo sign is your land."

The farmer held the bamboo sign and looked at the circles, circles, and sticks on it, and he was also stunned.

Although this civilian husband is illiterate, he knows that the writing is not in Chinese characters.

Why do you draw circles like us illiterate people?

The civilian husband smiled at Li Mengxi honestly.

He compared the vertical circles on the bamboo slices with the vertical circles on the bricks. They were the same.

The civilian husband probably understood what Li Mengxi meant.

"Uncle, take a brick and carve the words on it. If it rains, the words will be washed away." Li Mengxi reminded.

Then, he went to the next acre of land.

After Li Mengxi walked away, the uncle picked up a pebble and rubbed it against the bricks.

The stone is harder than the green bricks and can grind out writing on the bricks.

Digging the second acre of land, on the green bricks, Li Mengxi wrote 002.

In this way, three hundred boundary stones were buried, and the work was not completed until dark.

Everyone rushed back, and the peasants also came back carrying hoes.

That night, as usual, they had dinner and chatted at night. Liu Bei was very interested in the numbers written by Li Mengxi during the day. Li Mengxi also said during the day that it was a secret biography of his master, and Liu Bei's interest greatly increased.

In the candlelight, Li Mengxi met the eyes of Liu, Guan, and Zhang, and then looked at his younger brother in his arms. He rolled his eyes and said, "That's good, I'll give these three people the art of arithmetic."

Guigu’s fortune telling...

Before they even started learning, just hearing the name made Liu, Guan, and Zhang's eyes light up.

"Where is the pen and paper?" Li Mengxi pretended to ask with a serious expression and a deep voice.

Zhang Fei immediately set out to get paper and pen.

Bringing paper and pen, Li Mengxi took up the pen and started writing from 0 to 9 using rough straw paper.

There are ten numbers in total.

Under the numbers, Chinese characters are written for comparison.

After writing, Li Mengxi turned his pen upside down and pointed at the numbers one by one.

"You three, watch. Little Brick, you also watch."

"This is, the nine numbers 0, which correspond to the characters zero, one, two, three, four, etc."

"Can you three understand?"

Liu, Guan, and Zhang all nodded and corresponded one by one. There was nothing difficult to understand.

That is, the numbers written by Li Mengxi are convoluted and a bit weird.

Liu Bei frowned and thought, "Well Xi'er, this one is written at nine, how about ten?"

Li Mengxi had a smile on his face, "This is the key!"

"Decimal system, that is, every tenth is one."

As he spoke, Li Mengxi took the pen again and drew circles after circles on the paper, eight circles in a row.

"One," Li Mengxi pointed to the number in the ones digit and said, "Ten," then pointed to the tens digit.

"Hundreds, thousands, ten thousand." Point forward one by one.

"One hundred thousand, one million, ten million. Keep writing, and the more you write, the bigger it gets."

After that, give Liu, Guan, and Zhang time to digest.

Seeing Liu, Guan, and Zhang's brows furrowed and serious, Li Mengxi wanted to laugh.

It's like teaching children a lesson.

After a while, Li Mengxi started writing again.

As soon as he moved his pen, Liu, Guan, and Zhang gathered around the stone table, all looking over.

"Just now Xuande Gong said, how to write ten, two digits, one in the tens place, and a zero in the ones place, it is ten."

As he spoke, Li Mengxi wrote, 10

After another moment of pause, Li Mengxi raised his head and looked at the thoughtful Liu, Guan, and Zhang trio.

"Then let me ask, how should I write eleven according to my Guigu numeral writing method? Xuande Gong." Li Mengxi handed the pen to Liu Bei.

Liu Bei frowned slightly and took the pen with some anxiety.

Eleven, "Could it be two vertical ones?" Liu Bei was a little unsure.

"Write!" Li Mengxi smiled, noncommittal.

Liu Bei tentatively wrote two lines on the paper.

"How should we write twelve?" Li Mengxi looked at Liu Bei.

After writing eleven, Liu Bei was no longer unfamiliar with this counting method.

Twelve, Liu Bei wrote, 12.

"Thirteen." Li Mengxi continued to ask.

"fourteen."

"fifteen."

…

"nineteen."

"twenty."

When you reach twenty, the critical point comes.

Liu Bei, 11, 12, 13 can write numbers starting with 1 easily. Li Mengxi asked twelve.

Liu Bei subconsciously wrote 1, and then wrote 2.

Doesn't this become 12?

Li Mengxi smiled and asked, "Mr. Xuande, did you write twelve or twenty?"

Liu Bei then suddenly realized that he looked at the two numbers he had written and realized that he had made a mistake.

Twenty, it should be... Liu Bei could think of how to write it, but he still couldn't make up his mind.

Liu Bei looked at Li Mengxi, but Li Mengxi smiled and said nothing.

"Every tenth day, one is added." Li Mengxi reminded.

Liu Bei hesitated for a moment, picked up his pen, and wrote a 2 and then a 0.

"That's right, the key is to carry!" Li Mengxi smiled.

"Then Mr. Xuande, how do you write fifty?"

Liu Bei looked up the numbers and wrote 50.

Fast and right.
To be continued...