// Page 251

import java.util.Scanner;
public class Prog_16_mult
{
	public static int mult (int n)
	{	if (n==1)
			return 1;
		else
			return n * mult(n-1);
	}

	public static void main(String[] args)
	{
		int m = mult (4);
		System.out.println("The result is: " + m);
	}
}