You can convert between feet and inches, or between cubic feet and cubic inches. You can not convert between cubic feet and inches.
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A cubic foot has (1 ft)^3. Since 1 ft = 12 in, then (12 in)^3 = 1728 cubic inches.
The answer is specific to the product in the cu ft. A cu ft of water will be different than that of a cu ft of feathers ETC.
Convert the inches to feet and work out the volume of the cuboid with base area 110 sq ft and height of 3 inches: 12 in = 1 ft → volume = 110 sq ft x 3 in = 110 sq ft x 3/12 ft = 27 ½ cu ft (= 27.5 cu ft)
1 cu. ft. = 28.32 liters
Eight cubic feet - assuming you meant 24 inches on each side.