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 sc=new Scanner(System.in);
      int a[]=new int[3];
      int i,vir=1,r;
      for(i=0;i<3;i++)
       a[i]=sc.nextInt();        
      while(a[2]>0)
      {
       r=calc(vir,a[0],a[1]);
       vir=r;
          a[2]--;
  }/* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
    System.out.print(vir%(10^9+7));
    }
     public static int calc(int virus,int a,int b)
      {
         int v=(int)((a*0.5*virus)+(b*0.5*virus));
         return v;
                 }
}