The goal of writing a number in scientific notation is to have a decimal number, with one digit to the left of the decimal point, followed by a ×⨯1010 to some power. To format the number this way, divide the 3153600031536000 by 1010 77 times, making it 3.15363.1536. Each division by 1010 moves the decimal point to the right one digit, but in order to keep the same number, multiply 3.15363.1536 by 107107.3.1536×107.