#include <bits/stdc++.h>
#define ll unsigned long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define MOD (ll)(1000000000 + 7)
using namespace std;
ll p10mod(ll n)
{
    if (n == 1)
        return 10ll;
    ll half = p10mod(n / 2);
    if (n % 2 == 0)
        return (half * half) % MOD;
    else
        return (half * half * 10) % MOD;
}
ll p3mod(ll n)
{
    if (n == 1)
        return 3ll;
    ll half = p3mod(n / 2);
    if (n % 2 == 0)
        return (half * p10mod(n / 2) + half) % MOD;
    else
        return (3ll * p10mod(n - 1) + half * p10mod(n / 2) + half) % MOD;
}

int main()
{
    ll n;
    cin >> n;
    cout << (p10mod(n) + p3mod(n)) % MOD << endl;
    return 0;
}