There's no direct comparison between inches and cubic feet, because they're
units of different things. "Inches" is a measurement of length. "Cubic feet" is
a measurement of volume or capacity.
But if you'd like to discuss 'cubic inches', there are 1,728 of those in 1 cubic foot,
and 31,104 of them in 18 cubic feet.
But if "inches" are what you really mean, then you can only compare those to 'feet',
not to 'cubic feet. There are 12 inches in 1 foot, and 216 inches in 18 feet.
18 feet is 216 inches.
216 inches / 11 feet = 18 feet/11 feet = 18/11
18 feet = 216 inches
216 inches is 18 feet.
31,104 cubic inches = 18 cubic feet.
There are 12 inches in a foot - so 18 feet = 18 x 12 = 216 inches.1 feet = 12 inches18 feet = 216 inches1 foot = 12 inches18 feet = 18 x 12 = 216 inches
18 feet is 216 inches.
There are 12 inches per foot so 18 feet is 12 x 18 = 216 inches.
There are 12 inches in one foot. Therefore, 216 inches is equal to 216 / 12 = 18 feet.
1.5 feet exactly !
If the question is 12"x12"x10" the answer .833 cu.ft
216/12 equals 18 feet.