using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Numerics;

class Solution
{
    static void Main(String[] args)
    {
        string[] strings = Console.ReadLine().Split(' ');




        //var strings = args;
        var values = strings;
        var a = BigInteger.Parse(values[0]);
        var b = BigInteger.Parse(values[1]);
        var sum = a + b;
        var mn = new BigInteger(2);
        var t = BigInteger.Parse(values[2]);

        var module = new BigInteger(1000000007);
        Int64 index = 0;


        var val = BigInteger.Divide(sum, mn);

        var result = BigInteger.ModPow(val, t, module);


        //var result = Math.Pow(0.5, t) * Math.Pow(sum, t) % module;

        Console.WriteLine(result);
    }
}