#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    int a,b,t,d=1;
    cin>>a>>b>>t;
    double c=0;
    while(c!=t)
        {
             d=d*(a*0.5+b*0.5);
    c++;}
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    d=d%(10^9+7);
    cout<<d;
    return 0;
}