Answer:
L x W x H
Step-by-step explanation:
Length X Width X Height = Your answer
Using length x width x height your able to get a simple and correct answer (sometimes) It is also best to show either a diagram of the shape and mark where each and every measurement goes. To show your work, i think it as to show your work, others might not.
PS : I am bad at wording things, so this is what you get, probably a better answer than the other one.
