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) {
        Scanner scan = new Scanner(System.in);
        int factora = scan.nextInt();
        int factorb = scan.nextInt();
        int millis = scan.nextInt();
        
        double initialTransformation = (0.5*factora) + (0.5*factorb);
        int result = (int) (Math.pow(initialTransformation, millis) % (Math.pow(10, 9) + 7));
        System.out.println(result);
        
    }
}