Seventh Decimal Place

When Zhou Yan woke up, it was ancient times. He has a body that does not belong to him, a string of numbers that do not belong to this world, and a sister who calls him brother. He couldn't beat the person he was supposed to beat, so he tried another method. Carving symbols to keep accounts, measuring land and erecting stakes, measuring shadows to determine solar terms. In three years, he went from a young man who no one wanted to sit at the same table with with others to becoming the most wanted settler in the city. Then he discovered that the pi in this world can only be calculated to the seventh decimal place. The eighth place is not accurate at all. . . .