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;

namespace _4_B
{
    class Program
    {
        static void Main(string[] args)
        {
            float r = float.Parse(Console.ReadLine());
            Decimal result1;
            result1 = Math.Round((decimal)(r * r * Math.PI), 6, MidpointRounding.AwayFromZero);
            Decimal result2;
            result2 = Math.Round((decimal)(r * 2 * Math.PI), 6, MidpointRounding.AwayFromZero);
            Console.WriteLine(result1.ToString() + " " + result2.ToString());
        }
    }
}