Soul - noob work #2

>>> from math import pi>>>>>> radio = 3>>> volumen = 4.0/3.0 * pi * radio **>>>>>> print volumen113.097335529>>> raw_imput = 12>>>>>> radio = float(raw_imput)>>> volumen = 4.0/3.0 * pi * radio **>>>>>> print volumen7238.22947387>>>>>> print radio12.0>>> raw_imput =  1000>>>>>> radio = float(raw_imput)>>>>>> print radio1000.0