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);
        int a = in.nextInt();
        int b = in.nextInt();
        String t = in.next();
        BigInteger tt = new BigInteger(t);
        BigInteger rate = new BigInteger(Integer.toString((int)((0.5 * a)+ (b*0.5))));
        System.out.println(rate.modPow(tt,new BigInteger("1000000007")));       
    }
    
    

}