Let's break this down step by step.
You have:
For every x, you have 2y.
For every y, you have 2z.
If you have 11x, and for every x you have 2y, then you have 11 * 2y = 22y.
Now, for every y, you have 2z. Since you have 22y, you will have 22 * 2z = 44z.
So, if you have 11x, you would have 44z.