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

typedef long long ULONG;

ULONG power(ULONG a, ULONG b) {
    
    if (b == 0)
        return 1;
    ULONG temp = power(a, b/2);
    if ( (b % 2) == 0 )
        return ((temp % 1000000007) * (temp % 1000000007)) % 1000000007;
    else
        return ((((a % 1000000007) * (temp % 1000000007)) % 1000000007) * temp) % 1000000007;
}

int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */ 
    ULONG a, b;
    ULONG t;
    ULONG total = 0;
    
    cin >> a >> b >> t;
    
    //total = (int ( pow(0.5, t) * pow((a+b), t)) ) % 1000000007;
    
    total = power((a+b) * 0.5, t);
    
    cout << total;
        
    return 0;
}