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 mod = new BigInteger("1000000007");
        BigInteger div = new BigInteger("2");
        BigInteger cells;
        cells = a.add(b);
        cells = cells.divide(div);
        cells = cells.modPow(t, mod);
        System.out.println(cells);
    }
}