using System;
using System.Collections.Generic;
using System.IO;
class Solution {
    static void Main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution */
         string[] arr_temp = Console.ReadLine().Split(' ');
            long a = 0;
            long b = 0;
            long t = 0;

            long.TryParse(arr_temp[0], out a);
            long.TryParse(arr_temp[1], out b);
            long.TryParse(arr_temp[2], out t);



            long k = (long) ((0.5 * a) + (0.5 * b));
            long x = (long)power(k, t, 1000000007);

            //Int64 r = Convert.ToInt64(x % power(10, 9, 7));

            Console.WriteLine(x);
    }
     static long power(long x, long y, int p)
        {
            long res = 1;      // Initialize result

            x = x % p;  // Update x if it is more than or 
            // equal to p

            while (y > 0)
            {
                // If y is odd, multiply x with result
                if (y % 2 > 0)
                    res = (res * x) % p;

                // y must be even now
                y = y >> 1; // y = y/2
                x = (x * x) % p;
            }
            return res;
        }
}