The volume of a box is equal to the length l times the width w times the height h.
Substitute the values of the length l=7.5, the width w=7.5, and the height h=7.5 into the formula.
Multiply 7.5 by 7.5.
Multiply 56.25 by 7.5.
Find the Volume box (7.5)(7.5)(7.5)