#include <algorithm>
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(), (x).end()
#define ll long long
#define INF 1000000000000000000
typedef pair<ll, ll> pll;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    ll N;
    cin >> N;
    ll exp = 1;
    ll MOD = pow(10, 9) + 7;
    ll ans = 0;
    rep(i, N) {
        ans += exp * 3;
        ans %= MOD;
        exp *= 10;
        exp %= MOD;
    }

    ans += exp * 1;
    ans %= MOD;
    cout << ans << endl;
}