Solve for the volume:
V₁ = L × W × H
V₁ = (9 in) (4 in) (2 in)
V₁ = 72 in³ (Volume of each brick)
V₂ = (36 ft) (12 ft) (7 ft)
V₂ = 3,024 ft³ (Total Volume of bricks when piled)
Convert 3,024 ft³ to cubic inches:
1 cubic ft = 1,728 cubic inches
3,024 ft³ x 1,728 in³/ft³ = 5,225,472 in³
Divide the result by volume of a brick:
5,225,472 in³ ÷ 72 in³ = 72,576 bricks
ANSWER: 72,576 bricks