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;
using System.Collections.Generic;
using System.Linq;
using System.Text;


namespace radius
{
    class Program
    {
        static void Main(string[] args)
        {
            Double r, area, circumference;
            r = Double.Parse(Console.ReadLine());
            area = r * r * 3.14;
            circumference = 2 * Math.PI * r;
            Console.WriteLine("{0} {1}",area, circumference);

        }
    }
}