80 yards is a measure of distance, not of area so the answer depends on the shape of the cases.
2 yards
577 yards.
2 and 2/3 yards.
You will need 3.5 square yards of material to cover 32 square feet.
150 ft
1 yard
266.66 cubic yards ( not square yards)
77/9 cubic yards for every inch of depth.
3,495.6 cubic yards.
9 yards x 27 yards = 243 square yards.
You will need at least 32 square yards of carpet to cover that area.
47.55 cubic yards . 4" would be 5.23 cubic yards.