There is no equivalence.
A foot is a measure of length or distance in 1-dimensional space while a square inch is a measure of area in 2-dimensional space. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid without some addition information.
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1,080 inches.
For basic computations, consult Google.90 inches x 59 inches in square feet=>(90 inches) x 59 inches = 36.87500 square feet36'10 1/2" square or 36.875square foot
There are 12 inches in one foot. Therefore, 90 feet is equal to 90 x 12 = 1080 inches.
90 x 130 = 11,700 square feet.
90 X 144 (INCHES PER SQ FT) = 12,960 INCHES. 12,960 INCHES DIVIDED BY 12 (INCHES PER LINEAR FT) = 1080 LINEAR FEET