To solve this, it is easiest to first convert these two values into feet:
12'11 = 12 + 11/12 = 155/12 (or ~12.916)
7'10 = 7 + 10/12 = 70/12 (or ~5.833)
Then you multiply the two values to determine the area in square feet:
(155/12) (70/12) = 10850/144 = ~75.347 ft^2
280 square feet.
220 square feet
It is 40,000 square feet.
10,763.9 square feet.
1,205.56 square feet.
50 square feet = ~4.65 m2
1,620 square feet.
1 (square meter) = 10.7639104 square feet.
1,350 square feet.
150 square feet
1.07474093 × 1014 square feet
376.74 square feet.