#include<stdio.h>
int main() {
	unsigned long long n, mod = 1000000007;
	scanf("%llu", &n);
	if (n >= mod) {
		puts("0");
	}
	else {
		unsigned long long ans = n, i = 2;
		while (i < n) {
			ans = (ans*i++) % mod;
		}
		printf("%llu\n", ans);
	}
}