Powers can be used to express some numbers in several ways. For example, 64 can be expressed as 4 exponent 3 or 2 exponent or 8 exponent 2. Write each number in two ways as powers.

my actual question is how do you find out what powers the number can be of? for the example given in the question, how did they know that the number can be represented as 4 exponent 3? is there a formula or smth?????