using System;

public class Program

{

    public static void Main(String[] args)

    {

        Console.WriteLine("==============================");

        Console.WriteLine("     VOLUME BOLA BY VIONA     ");

        Console.WriteLine("==============================");

        Console.WriteLine();

        Console.WriteLine("masukkan jari-jari") ;

        double jariviona;

        double piviona;

        double volbolaviona;

        jariviona = double.Parse(Console.ReadLine()) ;

        volbolaviona = 1.3333333 * piviona * jariviona * jariviona * jariviona;

        Console.WriteLine( "volume bola dengan jari-jari " + jariviona) ;

        Console.WriteLine(" adalah " + volbolareza) ;