#include "bits/stdc++.h"

#pragma warning(disable:4996)
using namespace std;
long long int mod=1e9+7;
pair<long long int, long long int>mul(
	pair<long long int, long long int>&l,
	pair<long long int, long long int>&r) {
	auto p=make_pair(l.first*r.first,l.second*r.first+r.second);
	return make_pair(p.first%mod,p.second%mod);
}


pair<long long int,long long int> solve(pair<long long int,long long int> a, long long int b) {
	pair<long long int,long long int>answer(1,0);
	if(b==0)return answer;
	if (b % 2) {
		answer=a;
	}
	auto x=solve(a,b/2);
	x=mul(x,x);
	answer=mul(answer,x);

	return answer;
}
int main() {
	long long int N;cin>>N;
	pair<long long int,long long int>p=solve(make_pair(10,3),N);
	cout<<(p.first+p.second)%mod<<endl;
   return 0;
}