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

unsigned long long int power(unsigned long long int x,unsigned long long int y,unsigned long long int p)
{
    unsigned long long int res = 1;    
    x = x % p; 
    while (y > 0){
        if (y & 1)
            res = (res*x) % p;
        y = y>>1;
        x = (x*x) % p;  
    }
    return res;
}
int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    unsigned long long int a,b,t,count=1;
    unsigned long long int sum=0;
    cin>>a>>b>>t;
   
        sum=(0.5*a*1)+(0.5*b*1);
        sum=power(sum,t,1000000007);
    cout<<sum;
}