#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#define M 1000000007
using namespace std;

long long int power(long long a,long long b)
{
    if(b==0)
        return 1;
    else if(b==1)
        return a;
    else if(b%2==0)
        return power((a*a)%M,b/2);
    else
        return (power((a*a)%M,b/2)*a)%M;
}

int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int a,b;
    long long t;
    cin>>a>>b>>t;
    int exp=a*0.5+b*0.5;
    long long n=power(exp,t);
    cout<<n%1000000007;
    return 0;
}