from math import pi

r = float(eval(input()))

area = pi * r**2 

circumference = 2 * pi * r

print((area, circumference))
import math



r = float(eval(input()))



area = math.pi * r**2

diameter =  2 * math.pi * r



print((area, diameter))



from math import pi

r = float(eval(input()))
area = pi * r**2
circumference = 2 * pi * r
print((area, circumference))

import math

r = float(eval(input()))
area = math.pi * r**2
diameter = 2 * math.pi * r
print((area, diameter))

-from math import pi +import math -area = pi * r**2 -circumference = 2 * pi * r -print((area, circumference)) +area = math.pi * r**2 +diameter = 2 * math.pi * r +print((area, diameter))