Find the radius of a sphere with volume

So the question is:
Volume= 128π/3cm cubed
R= ?

Volume = 4πR^3/3 = 128π/3 (in units of cm cubed)
Multiply both sides by (3/4π)
R^3 = 32
R = 32^(1/3) ~ 3.1748 cm

Regards - Ian