length times width
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Anywhere between 0 square feet and approx 998.2 square feet - it all depends upon the exact shape of the complex figure. To calculate the area of a complex figure, split it up into shapes for which you can workout the area and then add all the areas of the shapes together.
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.
Square feet is a measure of area. To figure out how many square feet there are in a square or rectangle, you would simply multiply the width by the length.For example, if the width is 5ft and the length is 7 ft, then the area would be 5x7 = 35 square feet.
You can find square inches from square feet by multiplying square feet by 144.
The area is 256 square feet.