//=====================================
// title: 階乘
// author: cjj
// date: 2007-10-09
/* Description: 
*/
//=====================================

#include <iostream>
#include <cmath>
using namespace std;

int Factorial(int n);

int main()
{
	for(int n; cin>>n;)
	{
		cout<<n<<"!= "<<Factorial(n)<<endl;
	}
	return 0;
}

int Factorial(int n)
{
	int sum=1;
	//if(n!=0)
	//{
		for(int i=1; i<=n; ++i)
	//	{
			sum*=i;
	//	}
	//}
	return sum;
}