While Susana is packing rectangular boxes into crates, she notices that each crate is $$ times wider than the width of one box, and $$ times longer than the length of one box. Susana wants to know the greatest number of boxes she can pack into each crate.

Let the length of one box be $$ cm, and the width of one box be $$ cm.

Find an expression for the volume of one box with a height of $$ cm.