#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <tuple>
using namespace std;

#define YES(condition) if(condition){ cout << "YES" << endl; }else{ cout << "NO" << endl; }
#define Yes(condition) if(condition){ cout << "Yes" << endl; }else{ cout << "No" << endl; }
#define Poss(condition) if(condition){ cout << "Possible" << endl; }else{ cout << "Impossible" << endl; }

#define mod long(1e9 + 7)

long power(long base, long exponent){ if(exponent % 2){ return power(base, exponent - 1) * base % mod; }else if(exponent){ long root_ans = power(base, exponent / 2); return root_ans * root_ans % mod; }else{ return 1; }}

int main(){
    long B, C, D;
    cin >> B >> C >> D;
    B %= mod;
    C %= mod;
    D %= mod;
    if(C == 1){
        cout << B * D % mod << endl;
        return 0;
    }
    cout << B * (power(C, D + 1) - C + mod) % mod * power((C + mod - 1) % mod, mod - 2) % mod << endl;
}