#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    long long t, tt;
    int a, b, c;
    long res;

    cin >> a >> b >> t;
    c = (a+b)/2;
    res = 1;     
    tt = t % 1000000006;
    long usin[50], k;
    int j=0;
    k=1;
    usin[0] = c;
    while (2*k <= tt){
        k *= 2;
        j ++;
        usin[j] = usin[j-1]*usin[j-1];
        usin[j] = usin[j] % 1000000007;
    }
    res = 1;
    j = 0;
    while(tt>0){
        if (tt % 2 == 0) tt = tt/2;
        else{
            tt --;
            tt = tt/2;
            res *= usin[j];
            res = res % 1000000007;
        }
        j ++;
    }
    cout << res;
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    return 0;
}