#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using ll =  long long ;
using P = pair<int,int> ;
const ll INF = 1e10;
const  int MOD = 1000000007;

long long modpow(long long a, long long b){
        bitset<50> bit(b);
        string s = bit.to_string();
        long long ret = 1;
        for (int i = 0;i< s.length(); ++i){
                ret = (ret * ret) % MOD;
                if(s[i]-'0') ret = (ret * a) % MOD;
        }
        return ret;
}

/*繰り返し二乗法でxのmod逆元を取る*/
long long inverse(long long x){
    return modpow(x,MOD-2);
}

int main(){
    ll b,c,d;
    cin >> b >> c >> d;
    b %= MOD; c %= MOD;
    if(c==1){
        d %= MOD;
        cout << (b*d)%MOD << endl;
    }else{
        ll ans = (((modpow(c,d) - 1 + MOD)%MOD) * ((c * b)%MOD))%MOD;
        ans = (ans * inverse((c-1+MOD)%MOD))%MOD;
        cout << ans << endl;
    }
    return 0;
}