729 square feet.
27*27=729
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There are: 4.5 ft × 6 ft = 27 sq ft on the floor and top of the closet; 4.5 ft × 9 ft = 40.5 sq ft on the two sides; and 6 ft × 9 ft = 54 sq ft on the front and back. In total there is a surface area of 2 × 27 sq ft + 2 × 40.5 sq ft + 2 × 54 sq ft = 243 sq ft.
The area is 21*31 = 651 square feet.
A 27 ft X 27 ft room: Just multiply 27 ft X 27 ft = 729 ft2 or 729 square feet.
It is square ft.
Perimeter=28 ft Area=49 square ft