How does 1 calculate the square of any number?

Just multiply it to itself.

e.g. No. 3 ; 3 squared 3^(2) = 3 x 3 = 9

Algebraically, it is x X x = x^(2)

What it means ; The two adjacent sides of a square are the same length . So to find the area of a square, you just multiply the two sides together.