If both dimensions are in feet then 8.5 times 6 = 51 square feet
If the room is rectangular, simply multiply length x width.
Assuming that the 8.5 refers to 8.5 feet then it is 51 sq ft.
108 square feet
165 square feet
360 square feet.
144 square feet.
There are 66 square feet.
288 square feet.
234 square feet.
There is 121 square feet in a 11'x11' room.
There are 270 square feet in a 15'x18' room.
A room measuring 20' x 20' = 400 square feet
The room is 144 square feet.
60 square feet