so would i just do 196/6= 65.3?
Nope, you can't do that. The 196 is a volume, right? You told me in the OP that the volume of a cube is length times width times height. But now you've also told me that all the sides are equal. What does that tell you about the length, the width, and the height?
No, that's not it. What you need to see right now is at the very heart of this problem, so I feel it's not right for me to tell you what you're supposed to see. You have all the information you need. Apply a little imagination (by far the most important tool a mathematician can possess), and I think you'll get it.