Just multiply the 21 by the 12 and you have 252 square feet.
21*21 = 441 square feet.21*21 = 441 square feet.21*21 = 441 square feet.21*21 = 441 square feet.
21 feet by 21 feet is 441 square feet which converts to 49 square yards.
21 square feet.
21 x 4 = 84 square feet.
21*3 = 63 square feet.
21 x 21 = 441 square feet
14 x 21 = 294 square feet.
21 feet times 19 feet = 399 square feet
21 square yards = 189 square feet.
21 x 12 = 252 square feet.
189 square feet. (multiply square yards by 3 to get square feet)
14.4375 square feet.