using System;
using System.Collections.Generic;
using System.IO;
using System.Numerics;
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 wolo = Console.ReadLine();
        string[] numeros =  Console.ReadLine().Split(' ');
        ulong a = ulong.Parse(numeros[0].ToString()) , b = ulong.Parse(numeros[1].ToString()) ;
        ulong t = ulong.Parse(numeros[2].ToString());
        BigInteger virus = 1 ;
    
        
       // virus  =  (((( (a  * 1) / 2 ) + ((b * 1) /2 )) + (( (a * t) / 2)  + ((b * t) / 2))) * t) / 2 ;
        virus = BigInteger.ModPow(((a+b)/2) ,t,1000000007);
        //ulong respuesta  = virus % (1000000007);
        Console.WriteLine(virus);
        
        
    }

 static ulong power(ulong x, ulong y)
{
   ulong temp;
    if( y == 0)
        return 1;
    temp = power(x , y/2);
    if (y%2 == 0)
        return (temp*temp)  % (1000000007)  ;
    else
        return (x*temp*temp)  % (1000000007)  ;
}
    
 
    
}