#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
#include <random>
#include <cassert>
using namespace std;

#define rep(i, N) for (int i = 0; i < N; i++)
#define pb push_back

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<int, ll> i_ll;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
typedef vector<int> vi;
struct edge { int v; ll w; };

const int MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;
ll INF = INT_MAX;

int main() {
	ll x; cin >> x;
	if (x >= 1000000007) {
		cout << 0 << endl;
		return 0;
	}
	ll ans = 1;
	for (int i = 1; i <= x; i++)
		ans = ans * i % MOD;
	cout << ans << endl;
}