Multiply the 10 times the 9, 90 square feet
There is 121 square feet in a 11'x11' room.
A 30ft x 14ft room = 420 square feet.
99 square feet !
228 square feet
361 square feet.
A room that is 12' x 15' would be 180 square feet.
400 square feet.
525 square feet.
120 square feet.
252 square feet.
324 square feet.
140 square feet.
352 square feet.
130 square feet.
770 square feet.
240 square feet
300 square feet.