import java.io.*;
import java.util.*;
import java.math.BigInteger;

public class Solution {

    public static void main (String args[]) {
        Scanner scanner = new Scanner(System.in);
        
        int factorA = scanner.nextInt();
        int factorB = scanner.nextInt();
        BigInteger time = new BigInteger(scanner.next());
        BigInteger mod = new BigInteger("1000000007");
        int temp = (factorA + factorB)/2;
        BigInteger divider = new BigInteger(Integer.toString(temp));
        
        System.out.println(divider.modPow(time, mod));
        
        scanner.close();
    }
}