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: Wrong Answer)

print("数字を入力してね")
r = input()
a = float(r) * float(2.0) * 3.14
b = float(r) * float(r) * 3.14
print(str(b), str(' '), str(a))