#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
#define REP(i, n) for (ll i = 0; i < n; i++)
#define REP1(i, n) for (ll i = 1; i <= n; i++)
#define RREP(i, n) for (ll i = n - 1; i >= 0; i--)
#define RREP1(i, n) for (ll i = n; i >= 1; i--)
#define FOR(i, a, b, c) for (ll i = a; i <= b; i += c)
#define RFOR(i, a, b, c) for (ll i = a; i >= b; i -= c)
#define MAX(a, b) (a > b ? a : b)
#define MIN(a, b) (a < b ? a : b)
#define INF 1145141919
typedef long long ll;
typedef unsigned long long ull;

#define MOD 1000000007

ull modfact(ull n) {
    ull a = 1;
    REP1(i, n) { a *= i % MOD; a %= MOD; }
    return a;
}

int main() {
    ull n, ans;
    scanf("%llu", &n);
    if (n >= 1000000009) ans = 0;
    else ans = modfact(n);
    printf("%llu\n", ans);
    return 0;
}