"Hey, there's a black boulder here that's different from the other rocks." Soon, someone found the stele.

Walking towards the stele, he saw the patterns and words carved by the Akha people on the stele. "Come and see, there is a big stone tablet here, and the stone tablet is carved with patterns and words."

Suddenly, a group of people hula ran to the stone monument.

The stele is very large, more than ten meters long and more than 4 meters high.

The first thing you see on the stele is a pattern.

A pattern of dots and lines like a matchstick put together, a pattern of a dozen concentric circles like a target on a shooting range

The symbols are, "A lot of people don't see what these patterns mean at first."

A few minutes later.

"This is a chart of the solar system." Suddenly, one of the people in the crowd exclaimed, "Look, the pattern is like a matchstick put together, it doesn't look like a goddess with wings who is harvesting, holding a bunch of ears of wheat in one hand and a sickle in the other, this is a Virgo constellation, and it can't be wrong." There is also a target-like pattern of more than a dozen concentric circles, which is a star chart of the solar system. ”

With the reminder of others, the right number was seated, and soon everyone saw what the two carved patterns represented.

"I see, this Earth." One of the tourists said loudly as he pointed to a concentric circle made up of a dozen concentric circles that resembled a shooting range target pattern.

"This is Mars."

"This is Venus."

Everyone pointed to the concentric circles on the target and said excitedly.

"Incredible."

"Yes, it's incredible, this Acre civilization has been able to draw a map of the stars of the solar system so accurately by observing the celestial phenomena a long, long time ago."

"Everybody come and see."

Soon someone made another discovery.

"There's also a carving here, which looks like some text."

"It's not words, it's the numbers of the Aka people." An old expert in his sixties and seventies with glasses walked by, looked at the patterns carefully for a few minutes, and then said, "This string of symbols is made up of two simple strokes, one horizontal and one vertical.

Anyone who has studied computer science knows that there is a binary number in the computer language, and the symbols here are the same as the operation principle of computer binary numbers, one horizontal represents 1, one vertical represents 0, and theoretically a string of symbols composed of one horizontal and one vertical can represent any number, and can also calculate any number through guò operation. ”

"I see, that is, the Aka people long ago were already proficient in using these simple symbols to count."

"Yes, the theory is this, translate the horizontal and vertical numbers in the above string of symbols into computer binary numbers of 1 and 0 respectively, and then translate the computer binary numbers into decimal numbers in our mathematics, so that the operation is very simple."

After listening to the old professor's explanation, everyone understood, and said with emotion, "This Acre civilization has given us too much incredible. ”

"Yes, it's hard to imagine that such a glorious civilization has no written records in the world's archaeological research and history."

Many people took out paper and pens, opened the calculator that came with their mobile phones, and according to the translation method just mentioned by the old professor, they first translated a string of numerical symbols composed of horizontal and vertical strokes on the stele into binary numbers, which is very simple and can be done by primary school students.

Then the computer binary number is translated into a decimal number, this step is difficult for many people, and people who have not learned computer language will not be able to translate.

Finally, it is very simple to use the methods of modern mathematics to calculate.

Everyone fell silent, only to hear the sound of the tip of the pen scratching the paper like a silkworm eating mulberry leaves, and the sound of the mobile phone buttons.

Ten minutes later, the first person to figure it out was a very young Chinese tourist, he waved the paper in his hand, and said proudly, "I calculated it, it's 365.2424." ”

Chinese mathematics is good, seems to be a recognized fact all over the world, there was such a thing, as one of the Sino-British exchange projects, Dinghai City has as many as 60 mathematics teachers to England to help improve the mathematics level of secondary school students in the region, and the United Kingdom will also send more than 60 mathematics teachers to Dinghai Normal University for long-term study to improve the level of mathematics teaching.

"What!" A British professor had a shocked look on his face and exclaimed, "365.2424, are you sure!" ”

The Chinese tourist said with great certainty, "I'm sure, what's wrong?" Do you want me to do the math again for you to see, and figure it out in minutes? ”

"Meyer, don't forget it, it's indeed 365.2424, and I calculated it too." The companion of the British professor Meyer said, with the same incredible expression on his face.

Next a lot of people have figured it out, 365.2424.

As soon as the results of the calculation of 365.2424 are out.

Many people present were shocked, dumbfounded, and their mouths were wide open.

Anyone who knows a little bit about astronomy knows what this number jù is.

The man who didn't understand looked at his companion next to him with a shocked expression on his face. They looked confused.

"Is there something wrong? Isn't it just a string of math problems for the Acre? What is there to be shocked, such a big reaction, too exaggerated. ”

Ignorance is bliss.

Immediately, a young college student couldn't stand it anymore and stood up and explained, "365.2424, don't you see anything special about this number?" ”

"365, 365 days a year."

"Forget it, you don't understand so profound to tell you, let's talk to you more simply." The young college student was completely defeated by him, "We all know that there are 365 days in a year, which is based on the time it takes for the earth to revolve around the sun.

In fact, 365 days is an approximate number, and the exact number should be 365.2422 days, so 365 days in a year is 0.2422 days different from the actual year, so that after four years, it is nearly one day less than the actual year. In order to compensate for this difference, the calendar stipulates that there is a leap year in 4 years, that is, a year that is divisible by 4 is a leap year. In addition, it is stipulated that whenever there is a century year, it must be divisible by 400 to be considered a leap year. Got it now? 365.2424 is the time calculated by the Acre people for one revolution of the Earth around the Sun. ”

365.2422, 365.2424, you mean that the time it took for the Earth to orbit the Sun thousands of years ago was 365.2424 and the modern measurement of 365.2422, which is only 0.0002 days a year.

"Yes." ――

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