Three square feet equals 432 square inches.
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1 foot = 12 inches. So, 3 inches = 3 / 12 = 0.25ft
3 feet with a remainder of 7 inches.
3 feet is 36 inches, plus 7 inches, totalling 43 inches.
1 foot = 12 inches5 ft and 8 inches:= 5 + (8 inches x 1 ft/12inches)= 5 + 8/12= 5 + 2/3= 5 2/3 or 17/3 ft in fraction
Area = (length) times (width) = 4-ft x 3-ft = 12 square feet(1 square foot) = (12 inches) x (12 inches) = 144 square inches12 square feet = 12 x 144 = 1,728 square inches