#include<bits/stdc++.h>
using namespace std;
#define inf 0x3f3f3f3f
#define ll long long
#define fo freopen("in.txt","r",stdin)
#define fc fclose(stdin)
#define fu0(i,n) for(i=0;i<n;i++)
#define fu1(i,n) for(i=1;i<=n;i++)
#define fd0(i,n) for(i=n-1;i>=0;i--)
#define fd1(i,n) for(i=n;i>0;i--)
#define mst(a,b) memset(a,b,sizeof(a))
#define sd(n) scanf("%d",&n)
#define sdd(n,m) scanf("%d %d",&n,&m)
#define ss(s) scanf("%s",s)
#define sddd(n,m,k) scanf("%d %d %d",&n,&m,&k)
#define pans() printf("%d\n",ans)
#define all(a) a.begin(),a.end()
#define sc(c) scanf("%c",&c)
#define we(a) while(scanf("%d",&a)!=EOF)
const int maxn=200005;
const double eps=1e-8;
const int p=1e9+7;
int main()
{
    int n;
    while(cin>>n)
    {
        ll s=1;
        for(int i=1;i<=n;i++)
        {
            s=s%p*i%p;
        }
        cout<<s%p<<endl;
    }
    return 0;
}
