320 square feet (8 x 40 = 320)
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If it is 8 feet by 5 feet then there are 8*5 = 40 square feet
800 square feet (40 x 20 = 800).
8 feet by 19 feet = 152 square feet.
8 square feet = 0.888889 square yards.
35x40 feet is equal to 1400 square feet.