#include <iostream>
#include <vector>
using namespace std;
using ll = long long;
constexpr ll MOD = 1000000007;

using Mat = vector<vector<ll>>;
Mat mul(const Mat& m1, const Mat& m2)
{
    Mat ans(2, vector<ll>(2, 0LL));
    for (int i = 0; i < 2; i++) {
        for (int j = 0; j < 2; j++) {
            for (int k = 0; k < 2; k++) {
                (ans[i][j] += m1[i][k] * m2[k][j] % MOD) %= MOD;
            }
        }
    }
    return ans;
}

Mat unit()
{
    Mat ans(2, vector<ll>(2, 0));
    ans[0][0] = 1;
    ans[1][1] = 1;
    return ans;
}

Mat power(const Mat& m, const ll n)
{
    if (n == 0) { return unit(); }
    if (n % 2 == 1) {
        return mul(power(m, n - 1), m);
    } else {
        const Mat pp = power(m, n / 2);
        return mul(pp, pp);
    }
}

int main()
{
    ll B, C, D;
    cin >> B >> C >> D;
    B %= MOD, C %= MOD;
    Mat mat(2, vector<ll>(2, 0));
    mat[0][0] = C;
    mat[0][1] = B * C % MOD;
    mat[1][1] = 1;
    const Mat ans = power(mat, D);
    cout << ans[0][1] << endl;
    return 0;
}