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 C# (judge verdict: Wrong Answer)

using System;

class Program
{
	static void Main()
	{
		string D = Console.ReadLine();
		double a = double.Parse(D);
		Console.WriteLine("{0:F6} {1:F6}", a * a * 3.1415926535, (a + a) * 3.1415926535);
	}
}