The walls take away 2*1=<<2*1=2>>2 inches from each dimension
So the longer sides are 26-2=<<26-2=24>>24 inches
That is 24/12=<<24/12=2>>2 feet
The smaller dimension is 14-2=<<14-2=12>>12 inches
That is 12/12=<<12/12=1>>1 foot
So the internal volume is 2*2*1=<<2*2*1=4>>4 cubic feet
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