#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <iomanip>
using namespace std;
#define MOD (int)(1e9+7)

int main()
{
	long long n;
	cin >> n;

	if (n >= MOD)cout << 0 << endl;
	else {
		long long a = 1;
		for (long long i = n; i >= 1; i--) {
			a *= i;
			a %= MOD;
		}
		cout << a << endl;
	}

	return 0;
}