#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const ll MOD = 1e9 + 7;

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	ll n;
	cin >> n;
	if (n >= MOD) {
		cout << 0 << endl;
	} else {
		ll x = 1;
		for (int i = 2; i <= n; i++) {
			(x *= i) %= MOD;
		}
		cout << x << endl;
	}
	return 0;
}