When a product
is formed by multiplying a number by itself, such as.

7 x 7 = 7^{2}
2 x 2 x 2 = 2^{3} 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 = 5^{8}

then the power of the number is the number of times it has been
used in the product. So in the example given:

7 is said to be raised to the power of 2

2 is said to be raised to the power of 3

5 is said to be raised to the power of 8

When a number x is raised to the power of 2 it is said to be squared,
and when it is raised to be squared, and when it is raised to the
power of 3 it is said to be cubed. These names comes from the area
of a square of side x and the volume of a cube of edge x.