143. To arrive at square footage, you multiply the length in feet by the width in feet.
13 * 13 = 169 square feet. I believe John saw 13 by 11 feet......
Room Area is 13''x13''
so the area of square is=13*13=169 sq feet
so 13x13 room have 169 square feets
Multiply 13 x 13, that comes to 169 square feet on my calculator!
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