Hi,
Since you want the volume in cubic feet you need to change all the dimensions to feet. There are 12 inches in a foot so
8 inches is ^{8}/_{12} = ^{2}/_{3} of a foot
and
14 inches is ^{14}/_{12} feet.
Thus the volume is
^{2}/_{3} ^{14}/_{12} 23 = 17.89 cubic feet.
Penny
