Area of a rectangle
The area of a rectangle of width W and length L is calculated as follows:
A = W * L
The bedroom closet has a width of W=3.5 feet and a length of L=8.25 feet.
The area of the bedroom closet is:
A = 3.5 feet * 8.25 feet
Multiplying:
A = 28.875 square feet
The number of square feet in the floor of the closet is 28.875