#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#define M 1000000007
using namespace std;
long long int fast_pow(long long base, long long n)
{
    if(n==0)
       return 1;
    if(n==1)
    return base;
    long long halfn=fast_pow(base,n/2);
    if(n%2==0)
        return ( halfn * halfn ) % M;
    else
        return ( ( ( halfn * halfn ) % M ) * base ) % M;
}

int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
int a,b;
    long long int t;
    cin>>a>>b>>t;
    int m=(a+b)/2;
    cout<<fast_pow(m,t);
    return 0;
}