using System;

public static class Math

{

    public static double PI = 3.14;

    public static int cube(int n)

    {

        return n*n*n;

    }

}

    public class testMath{

    public static void Main(string[] args)

    {

        Console.WriteLine("Value of PI is " +Math.PI);

        Console.WriteLine("Value of cube of 3 is " +Math.cube(3));

    }

}