An example: A room 24 feet by 18 feet is 24 x 18 = 432 square feet.
A 30ft x 14ft room = 420 square feet.
234 square feet.
16' x 15' = 240 square feet.
121 square feet.
42.75 x 45.9 = 1962.23 square feet.
36 feet x 16 feet = 576 square feet.
36 feet x 16 feet = 576 square feet.
8 feet x 9 feet = 72 square feet.
38 x 15 = 570 square feet.
160 square feet.
240 square feet.
99 square feet !