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


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int a, b;
    long long t;
    cin >> a >> b >> t;
    long long s = (a + b)*0.5;

    long long arr[64];
    arr[0] = s;	//s % 1000000007;

    for (int i = 1; i < 64; ++i)
        arr[i] = (arr[i - 1] * arr[i - 1]) % 1000000007;

    long long count = 1;
    for (int i = 0; t > 0; ++i) {
        if ((t & 1) == 1)
            count = (count * arr[i]) % 1000000007;
        t >>= 1;
    }
    cout << (int)count << endl;
    return 0;
}