21 x 12 = 252 square feet.
12 feet times 12 feet = 144 square feet
There are: 12 times 12 = 144 square feet
The area 12 feet times 12 feet = 144 square feet.144 square feet are 16 square yards.
There are 12 times 14 = 168 square feet
There are: 16 times 12 = 192 square feet
The area of 12 foot times 20 foot are 240 square feet.
If the given dimensions are in feet then: 12 times 75 = 900 square feet
There are: 12 feet times 15 feet = 180 square feet
There are 12 times 20 = 240 square feet
If the dimensions are in feet then there are: 4 times 3 = 12 square feet
There are: 36/12 times 59/12 = 14.75 square feet
You'll need 12 times 12 = 144 square feet