import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        
        Scanner in = new Scanner(System.in);
        
        BigInteger a = new BigInteger(in.next());
        BigInteger b = new BigInteger(in.next());
        BigInteger t = new BigInteger(in.next());
       
        BigInteger branchingFactor = a.add(b).divide(new BigInteger("2"));
        
        BigInteger mod = (new BigInteger("10")).pow(9).add(new BigInteger("7"));
        
        System.out.println(branchingFactor.modPow(t, mod));
    }
}