The volume of a cylinder is PiR^2H, meaning Pi (3.14) x R^2 (radius squared) x the height.
We have our radius and height, so we can solve this!
The radius is 3, and the height is 6. Since the formula requires we square the radius, we must multiply the radius by itself once.
3 x 3 = 9.
Now that we have gotten the radius^2 and Pi out of the way, we need to multiply the height by the radius.
Since our height is 6, we multiply 6 by 9.
6 x 9 = 54.
Our answer is 54Pi.
I hope this helps!
