When multiplying exponents, what do you do when both the exponent and the base are different?

Oh wait now  i know what you mean, when you see the exponent you multiply the base by the same number that it is by the exponent. 
Example:
10(8)
10*10*10*10*10*10*10*10  You multiply 10 by its self 8 times. Hope this helps! :D