Hi there. You multiply a number greater than 1, but less than 10 by a power of 10. But because this is in decimal form, you have to do it by negative powers. In this case, you would move the decimal to the left 3 times. 10^-1 power is equivalent to 0.001 and 9.842 * 0.001 would give you 0.009842. That decimal in scientific notation is 9.842 * 10^-3
