Problem:
Circle

Write a program which calculates the area and circumference of a circle for given radius r.

Input

A real number r is given.

Output

Print the area and circumference of the circle in a line. Put a single space between them. The output should not contain an absolute error greater than 10-5.

Constraints

0 < r < 10000

Sample Input 1

2

Sample Output 1

12.566371 12.566371

Sample Input 2

3

Sample Output 2

28.274334 18.849556

Solution in Python3 (judge verdict: Accepted)

import math


def circle(r):
    return r * r * math.pi, 2 * r * math.pi


if __name__ == '__main__':
    r = float(input())
    s, d = circle(r)
    print('{:.5f}'.format(s), '{:.5f}'.format(d))