#   JTSK-350111
#   Problem 1.7.py
#   Utkarsh Mahamune
#   u.mahamune@jacobs-university.de

import math

radius = float(input("What's the radius of your circle?\n"))

areaOfCircle = (math.pi * radius * radius)

print("Area of your circle is", areaOfCircle, "square unit")
