Write a program which calculates the area and circumference of a circle for given radius r.
r = float(input())
b=(r+r)*(3.141592653589)
c=r*r*(3.141592653589)
print(f"{b:.5f} {c:.5f}")

import math
r=float(input())
print("{0:.6f}".format(r*r*math.pi),"{0:.6f}".format(2*r*math.pi))	
