import math


def area_circumference_generator(radius):
    area = math.pi * radius * radius
    perimeter = 2 * math.pi * radius
    return area, perimeter


def main():
    radius = float(input("Enter radius of circle: "))
    area, perimeter = area_circumference_generator(radius)
    print("Area of the circle is {:.15f} and circumference is {:.15f}".format(area, perimeter))


main()