public class TestFunction2{
	public static void main(String args[]){
      TestFunction2 test=new TestFunction2();    	
		test.factorial(3);
		test.factorial(6);
		test.factorial(9);
		}
	static void factorial(int n){
		int x=n;
		long m=1;
		for (;x>0;x--)
		   m*=x;
		   System.out.println(n+"!="+m);
		}	
	}