48 square feet. Multiply the length by the width. The result is the area in square feet.
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There are 135.67 square feet in 12' 4" x 11'
To convert feet to inches, you multiply by 12 since there are 12 inches in a foot. Therefore, 3 feet x 4 feet = 12 square feet. To convert square feet to square inches, you square the conversion factor (12 inches) to get 144 square inches per square foot. So, 3 feet x 4 feet = 12 square feet x 144 square inches = 1,728 square inches.
4 feet times 12 feet equals 48 square feet.
156 square feet
12 x 4 x 4 = 192 cubic feet