How does the volume of an oblique cylinder change if the radius is reduced to 2/9 of its original size and the height is quadrupled?

For the answer to the question above, 
Let's use the formula for finding the volume.

(pi) x 2/9 x 2/9 x r^2 

(pi) x 2 x 2 x r^ 2 x 4h
         9    9

simplify and solve.

The the will be
16 (pi) r^2h
81

I hope I helped you in my answer

What am i doing here. add?