How to multiply and divide with scientific notation?

To multiply two scientific notation numbers, multiply their coefficients and add their exponents. To divide two scientific notation numbers, divide their coefficients and subtract their exponents

example multiply: 2 x 10^4 times 4 x 10^6 = 2x4 = 8 x 10 ^ 10

Example divide: 10 x ^8 divided by 5 x 10^4 = 10/5 = 2 x 10^4