The volume of a sphere is calculated using the formula Volume

$=$

$$

$4$

$/$

$3$

$$

$*$

$($

r

$^$

$3$

$)$

$*$

$\backslash$

pi

$,$

$$

$$

where r is the sphere's radius.

Given variable sphere

$\_$

radius read from input and constant PI

$,$

$$

$$

compute the volume of a sphere and assign sphere

$\_$

volume with the volume.