In math, when you square a number, you multiply it by itself. So, when you square four, you get 16. You can also say “four squared” as “four to the second power.”
The number cubed is the number to the third power, so four cubed is 64. The exponent is written as a number above the number it is used with. In algebra, exponents are used a lot.
When you multiply exponents with the same base, you add the exponents and keep the base. For example, four squared times four cubed equals four to the fifth power, or 1,024. The number itself is a number to the first power.