Let's first determine the length. If w is the width of the garden, and the length is 4 times the width, then l=4w. Now, let's think of the area of a rectangle. Area equals length times width (lw) in a rectangle. So, since l=4w, we can substitute 4w in for l: 4ww. That's one expression. Now, let's make an equivalent expression. 4w is really 4w, so we have 4ww. ww=w squared, so another equivalent expression is 4w^2. (Note that ^2 means "squared.")
Answer: 4w*w, 4w^2
