H is height, and A is area. You are trying to figure out the length, width, and volume. To find the volume to H x A which is 5 1/4 x 12. 63 is the volume. To find the length and the width you must find (blank) x (blank) = 12. That could be 3 x 4, or 6 x 2. So your dimensions are Height = 5 1/4 Width = 3 (or 4) Length = 4 (or 3) Area = 12 Volume = 63 ~~~ Another answer is: Height = 5 1/4 Width = 2 (or 6) Length = 6 (or 2) Area = 12 Volume = 63