No. Surface area can be measured in square inches, but so can many other things.
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If you mean a rectangle and not a square then the area is 14 times 9 = 126 square inches
It is an area. By multiplying the two you would get 552 square inches.
Square feet is one way to measure area. Other ways to measure area are square inches, square meters, acres, square miles, etc.
Square inches measure area. Yards measure length.If you mean square inches (of area) per square yard (of area), read on.First, there are 12 inches to a foot, and 3 feet to a yard. That makes 12 x 3 = 36 inches per yard. then to find square inches in a square yard, you need to square the 36--that is, multiply it by itself. So....36 x 36 = 1296.
If you mean a length of 16 inches then the width is: 400/16 = 25 feet