401
1,000,000,000
400 20x20=400x1=400
400 (20x20) square inches is 2.78 square feet.
20x20 = 400 2x4= 8 400/8= 50 needed
400
20x20
2x2x2x2x
400
25p
14
Well honey, a 20x20 area equals 400 square feet. A sheet of 4x8 plywood covers 32 square feet. So, you'll need 13 sheets of plywood to cover that 20x20 space. Math doesn't lie, darling.
depends where u buy it?