Why is the French counting method so complicated?

I haven't studied French. Mathematically speaking, French is actually a mixed system, decimal, hexadecimal and hexadecimal. Sixty is a copy of the decimal system. When the left hand counts the joints of four fingers one by one with the thumb, it is exactly 12, which is why the expressions of 12 and 13 in English are completely different. In other words, there are still some 12 left in English. How did sixty come from? Please extend your right hand again. Every time you count your left hand, your right hand bends one finger, and the five fingers bend exactly 60. Do you feel like a fortune teller now? That's right. That's how sixty jiazi came from. People in China like to multiply six by 36 days and 72 days, and nine to one is also convenient. As for the binary system, it is even simpler. Put out your hands and feet, which is exactly 20. This linguistic phenomenon should be a legacy of the lack of reliable and convenient counting tools in medieval Europe. In the absence of counting tools, counting depends on limb-assisted handling. When the number exceeds the number of carry limbs, other combinations need to be selected to assist carry. This is easy to understand. 70, 12 decimal places and 5 decimal places are exactly 60, but going forward, 5 decimal places are not enough. There are two choices: one is to remember the last result with your brain, and the other is to clear multiple digits in the five-digit system. Moreover, 10 is not an integer for the 12 system, but it is very complicated for the middle and lower classes without education. Better add ten more fingers. So it's 60 plus 10n, 80 plus two toes, and 90 toes are used up. If you use 10 again, you won't be able to carry it. If you use sexagesimal again, it will be very troublesome. At this time, you can only change to a more convenient decimal. Imagine you stretch out a hand, bend one index finger, ten fingers, ten toes, bend it four times, and add ten fingers, and it becomes 90. The phenomenon of French should be similar to human cecum, which is useless, but it is not economical to get rid of it. Decimalization in Chinese is mainly due to the fact that China people have used abacus for a long time, and the invention of abacus has a lot to do with Chinese characters. In the end, the abacus has evolved into an efficient, portable and portable computing tool, so the decimal system has become popular, and the decimal system can only be circulated among the grassroots people who walk the rivers and lakes like fortune tellers. This is our heavenly stems and earthly branches counting method. The high degradation of mixed systems in English may be related to extensive trade in the era of great navigation. Global trade should need a method to count the greatest common divisor that can be found. Of course, English is much more receptive to foreign concepts and loanwords than French and German, which should also be the necessity of large-scale commercial trade. However, French, German and other languages lacked this evolutionary motivation, so they became living fossils of medieval counting methods.