If you know the perimeter of the square, you can find the area of the square in two steps. describe the two steps.

1) Take the perimeter and divide it by 4.
2) Take the answer from step 1 and square it (multiply by itself)

It's simple. If you know the perimeter of a square, just divide by 4 due to the 4 sides making the perimeter up. Now you have the length of just one side. Area = l*w or in this case s^2, so just multiply the side by itself and you have the area of a square!