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, multiply the 0.00000910.0000091 by 1010 −6-6 times, making it 9.19.1. Each multiplication by 1010 moves the decimal point one digit to the left, but in order to keep the same number, multiply 9.19.1 by 10−610-6.9.1×10−6