#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
//x^n=((x^2)^n/2) n is even
//x^n=x*((x^2)^(n-1/2)) n is odd
int main() {
    int a,b;
    long long t,n=1;
    cin>>a>>b>>t;
    long x=(a+b)/2;
    long z=10*10*10*10*10*10*10*10*10+7;
    while(t>0)
        {
        if(t&1)//if t is odd
            {
            n=n*x% z ;
        }
        t>>=1;
        x=x*x%z;
    }
    cout<<n;
}