There are 12 inches in a foot so 3 inches is 3/12 of a foot = 1/4 feet = 0.25feet.
You can't do this unless all the units are the same.
so 3 inches is 0.25 of a foot.
$${\mathtt{124}}{\mathtt{\,\times\,}}{\mathtt{83}}{\mathtt{\,\times\,}}{\mathtt{0.25}} = {\mathtt{2\,573}}$$
so the answer is a volume of 2573 feet cubed
There are 12 inches in a foot so 3 inches is 3/12 of a foot = 1/4 feet = 0.25feet.
You can't do this unless all the units are the same.
so 3 inches is 0.25 of a foot.
$${\mathtt{124}}{\mathtt{\,\times\,}}{\mathtt{83}}{\mathtt{\,\times\,}}{\mathtt{0.25}} = {\mathtt{2\,573}}$$
so the answer is a volume of 2573 feet cubed