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

long long fast_pow(long long int a,long long int n)
{
    long long result = 1;
    long long power = n;
    long long value = a;
    while(power>0)
    {
        if(power&1)
            {result = result*value;
            result = result%1000000007;}
        value = value*value;
        value = value%1000000007;
        power /= 2;
        //power >>= 1;
    }
    return result;
}

int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    unsigned long long int a, b, c, d, x, y;
    cin >> b;
    cin >> c;
    cin >> a;
    d = (b + c)/2;
    x = fast_pow(d,a);
    y = x % (fast_pow(10,9) + 7);
    cout << x;
    return 0;
}