insule01

#include <iostream>
#define M 1000000007
using namespace std;

long long int pow(long long int n,long long int p)
{
    long long int r;
    r=1;
    while(p>0)
    {
        if(p%2==1)
            r=(r*n)%M;
        n=(n*n)%M;
        p/=2;
    }
    return r;
}

int main()
{
	long long int n;
	cin>>n;
    cout<<(pow(2,n-1)*(n+1))%M;
	return 0;
}