Description: Multiplying really big or really small numbers is much easier when using scientific notation. This video gives an example of multiplying three numbers that are written in scientific notation. Created by Sal Khan and Monterey Institute for Technology and Education. We're asked to multiply 1.45 times 10 to the eighth times 9.2 times 10 to the negative 12th times 3.01 times 10 to the negative fifth and express the product in both decimal and scientific notation.*Teacher Advisor is 100% free.