# -*- coding: utf-8 -*-
from math import pi

r = float(input())
area = r**2*pi
circumference = r*pi*2
              
print("{:.6f} {:.6f}".format(area, circumference))
9f3e025e766341484e2c29dffbc922089ba1a8cd
<mask token>

<mask token>
print('{:.6f} {:.6f}'.format(area, circumference))

<mask token>
r = float(input())
area = r ** 2 * pi
circumference = r * pi * 2
print('{:.6f} {:.6f}'.format(area, circumference))

from math import pi
r = float(input())
area = r ** 2 * pi
circumference = r * pi * 2
print('{:.6f} {:.6f}'.format(area, circumference))

# -*- coding: utf-8 -*-
from math import pi

r = float(input())
area = r**2*pi
circumference = r*pi*2
              
print("{:.6f} {:.6f}".format(area, circumference))