As we all know, the basis of mathematical calculation is Arabic numerals 1, 2, 3, 4, 5, 6, 7, 8, 9, 0. Without these figures, we can't calculate. In fact, these Arabic numerals were not invented by Arabs, but originated in ancient India, and were later mastered, improved and spread to the west by Arabs, who called them Arabic numerals.

In ancient India, urban construction needed design and planning, and sacrifices needed to calculate the movements of the sun, the moon and the stars, so mathematical calculation came into being. Around 3000 BC, the number of residents in the Indus Valley was relatively advanced, and the decimal calculation method was adopted.