90
63 sq feet
21 x 3 yards/foot = 63 feet
If that's 12 x 90 feet, it's 1080 square feet. If that's 12 x 90 inches, it's 7.5 square feet.
7/10 x 90 = 63
To find the area of a square, you multiply the length by the width. In this case, 90 ft x 90 ft equals 8100 square feet. This is because each side of the square is 90 feet long, so the total area covered by the square is 8100 square feet.
Multiply 90 x .63= 56.7 is 63% of 90
90 x 7 = 630 sq ft
3 x 30 = 90 square feet (90 ft2).
90
63 sq feet
1,449 square feet.
2,079
There are 63*3 = 189 feet in 63 yards, since there are 3 feet in a yard.
90 x 130 = 11,700 square feet.
There are: 90*49.5 = 4455 square feet
150 x 90 = 13,500 square feet