#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#define mod 1000000007
using namespace std;
unsigned long long int power(unsigned long long int x1, unsigned long long int y)
{
    unsigned long long int res = 1;      
 
    x1 = x1 % mod;  
 
    while (y > 0)
    {
        
        if (y & 1)
            res = (res*x1) % mod;
 
        
        y = y>>1; 
        x1 = (x1*x1) % mod;  
    }
    return res;
}
int main() {
    
    unsigned long long int a,b,t,cells;
    cin>>a>>b>>t;
    unsigned long long int res=(power((a+b)/2,t));
    cout<<res;   
    return 0;
}