#include <cstring>
#include <cmath>
#include <cstdio>
#include <algorithm>
#include <iostream>
#include <ctime>
#include <vector>
#include <map>
#include <set>

using namespace std;

#define pb push_back
#define sz(a) (int)a.size()
#define fs first
#define sc second

typedef long long ll;
typedef pair<int,int> ii;

const int MOD = 1000000007;

ll a, b, t;

ll mu(ll a, ll b) {
    if (b==0) return 1;
    ll k = mu(a,b/2);
    k = k*k%MOD;
    return (b&1?k*a%MOD:k);
}

int main() {
	//freopen("input.txt","r",stdin);
    cin >> a >> b >> t;
    cout << mu((a+b)/2,t) << endl;
	return 0;
}