# How do you multiply #(4.0 x 10^-5) * (3.1 x 10^-2)#?

##### 1 Answer

Apr 2, 2015

You can just multiply similars by similars, since there is only multiplication:

Exponents are added up if their base are the same and if they are multiplied.

**Second Way**

The scientific notation is just there for readability.

The expression is equivalent to this: