Find surface area of a rectangle

In order to find the surface area of a rectangle:

- - Find or measure the length of the rectangle.

- - Find or measure the width of the rectangle.

- - Make sure both quantities are in the same units.

If they're not, then convert one or the other so that they are.

- - Multiply the two numbers.

The product is the area of the rectangle, in units of

square - (the unit in which the dimensions are measured).