108 square feet
A room measuring 20' x 20' = 400 square feet
12' x 12' = 144 square feet.
12 foot x 12 foot is 16 square yards
About 4.459 square meters.
If you are referring to 16 feet by 30 feet the formula would simply be 16x30=480.If it were inches, the formula is 16x30=480 divided by 144 = 3.333 square feet. The 144 is a constant in that formula.
16X30=480 SQ'
250 square foot
480... without using a calculator !
28
5
60 square feet
108 square feet
13.93 square meters.
130 square feet
165 square feet
7.25 square metres.