5 cubed, as in 5 to the power of 3?
Indices indicate how many times a number is multiplied by itself.
For example, 5 to the power of 2, a.k.a. 5 squared, would be 5 by 5, hence 25.
5 cubed would therefore be 5 by 5 by 5. We already know 5 by 5 (25), and now you multiply that answer by 5 again.
Your answer is 125.
