convert to cubic feet:
64.2 inches x 30.0 inches x 26.0 inches
u can do that and that would cancel inches out blah blah....then repeaton on other 2 dimensions then multiply to geth ur answer in feet cubed
however this may also help u in the future thus canceling feet cubed so you now have
thus giving you
we can check your answer by doing the above method chris showed (probobly safer but much much slower.....(as u can record how man inches cubed are in a feet for future use)
so
and finaly
hope that gives u help in the future..shortcuts are always nice(just can get messy if u make mistakes)