117 square feet
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9*13 = 117 square feet
To figure out how many square feet there are in that area, all you have to do is multiply your length (13 feet) by your width (9 feet). The answer is 117 square feet.
In total it is 117 square feet because you are measuring area and for area it is length times width so 13 times 9 equals 117 square feet
"regular feet" are one-dimensional measurements. Square feet are measures of area--two dimensional measurements. A square foot is a square that has foot long sides. 9 square feet are the area equivalent of 9 square feet.
9 A square yard is 3 feet across and 3 feet long. 3x3=9