$S_{hnon}$=$\frac{1}{3}$$r^{2}$`π``h`

import math

h=float(input())

r=float(input())

s=(1/3)*r*r*math.pi*h

shnon=round(s,8)

print(shnon)

${\color{#FF4F9A}K}{\color{#FF5FA8}r}{\color{#FF6FB5}a}{\color{#FF7FC1}l}{\color{#FF8FCD}v}{\color{#F79AD4}y}{\color{#EEA5DA}n}{\color{#E3B0E0}o}{\color{#D8BBE6}r}{\color{#CDB6EE}7}{\color{#BFAAF2}4}$