#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using PII = std::pair<int, int>;
using PLL = std::pair<ll, ll>;

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)


ll pow_mod(ll p, ll q, int mod)
{
    ll ret, r;
    ret = 1;
    r = p;

    while (q > 0)
    {

        if (q % 2)
        {
            ret *= r;
            ret %= mod;
        }

        r = (r * r) % mod;
        q /= 2;
    }
    return ret % mod;
}

int main()
{

#ifdef DEBUG
    cout << "DEBUG MODE" << endl;
    ifstream in("input.txt"); //for debug
    cin.rdbuf(in.rdbuf());    //for debug
#endif

    const int mod = 1e9 + 7;
    ll b, c, d, ans;
    cin >> b >> c >> d;
    b %= mod, c %= mod;

    if (c == 1)
    {
        d %= mod;
        ans = (b * d) % mod;
    }
    else
    {
        ans = (b * c) % mod;
        
        ans *= pow_mod(c, d, mod) - 1;
        ans %= mod;
        
        ans *= pow_mod(c-1, mod-2, mod);
        ans %= mod;
    }

    cout << ans << endl;
    return 0;
}