Question

how is the square footage of any building area determined? multiply length by width subtract length from width and multiply by 4 add length to width divide length by width

Explanation:

Step1: Recall area formula

For a rectangular - shaped building (most common), the area formula is $A = l\times w$, where $l$ is the length and $w$ is the width. Square footage is a measure of area.

Answer:

multiply length by width