12*21 = 252.
You seem to be unaware of the fact that you could have obtained the answer much more easily and quickly by using the calculator that comes as part of your computer.
12x21/18+29-11= 32
There are 9 CU FT in a yard....and if this is stated in feet, then take your measurement of 12x21 feet or 252 square feet times (7 inches/12 inches or .5833333 feet) to give you 147 Cubic feet , then divide by 9 CUFT/YD or 16.3333 Cu Yards....about two standard mixer loads
12 feet X 21 feet / 9 sq feet/sq yard = 28 sq yards
There are 7,025,356,800 sq feet in 12x21 square miles.
about 28
1x252, 2x126, 3x84, 4x63, 6x42, 7x36, 9x28, 12x21, 14x18,
12x21/18+29-11= 32
There are 9 CU FT in a yard....and if this is stated in feet, then take your measurement of 12x21 feet or 252 square feet times (7 inches/12 inches or .5833333 feet) to give you 147 Cubic feet , then divide by 9 CUFT/YD or 16.3333 Cu Yards....about two standard mixer loads
There are 12 inches in a foot. 12x21=252 inches Tip: Google will multiply numbers with a * between them 12*21=
12 feet X 21 feet / 9 sq feet/sq yard = 28 sq yards