21 x 4 = 84 square feet.
4 feet by 10 feet is 40 square feet.
4' * 4' = 16 sq feet.
4 x 9 = 36 (square feet).
21 x 4 = 84 square feet.
36 x 4 = 144 square feet.
4*9 = 36 square feet.4*9 = 36 square feet.4*9 = 36 square feet.4*9 = 36 square feet.
If the given dimensions are in feet then 4 times 4 equals 16 square feet
4' X 6= 24 square feet.
Simply multiply 8 feet by 4 feet and you have your answer... 32 square feet!
43.0556 square feet.
56 square feet.