If it's a 12'X12' room then it's 144 sq. ft.
None. It can be written in square inches though. To convert square feet to square inches, multiply by 144 (one square foot is 12x12 square inches).
So each tile is 12" by 12" square, right? So each tile is ONE square foot? (a perfect square that's a foot long and a foot wide). Each tile is one square foot and you need to know how many add up to 400 square feet. I think the answer is the square root of Pi.
12" x 12" = 1 square foot To cover 500 square feet requires 500 of them, plus some extra in case you crack or chip a few.
549!
144 square feet
Since a 12x12 tile is one square foot, then 38 12x12 tiles will cover 38 square feet.
It is 144 square feet.
the square root of 144 is 12. 12x12=144
144 12x12
Since each 12x12-inch tile is one square foot, you will need 750 of them.
A 12x12 inch paver is one square foot. So you would need 240 square feet.
12X12=1 Square Foot of tile. You would need 49 Square Feet of tile.
Gee, a square foot is 12x12, difficult problem.
Multiply by 144, since there are 144 square inches in a square foot (12x12).
== I hope that this is what you are looking for, but there are 144 square inches in a square foot. There are 12 inches in a foot so 12x12== 144. ===
12x12 paper is 12 inches on each side; the area of a sheet of 12x12 paper is 144 square inches or one square foot.