Question 483394
Well, to find volume, you need to multiply length by width by height...but before you can do anything, all your units have to match.
To turn feet to inches, you just multiply however many feet by 12 (12 inches in a foot).
Now, your dimensions are 120in. by 96in. by 42in.
Next, you multiply these numbers all together, and your answer will be in cubic inches.
483840in. (cubed) It seems like a big number, but you converted a large number of feet to inches, so it's not as big as it really looks.
Hope i helped! :)
-Rosey