#include "bits/stdc++.h"
using namespace std;
#define int long long
#define FOR(i, a, b) for(int i=(a);i<(b);i++)
#define RFOR(i, a, b) for(int i=(b-1);i>=(a);i--)
#define REP(i, n) for(int i=0; i<(n); i++)
#define RREP(i, n) for(int i=(n-1); i>=0; i--)
#define ALL(a) (a).begin(),(a).end()
#define UNIQUE_SORT(l) sort(ALL(l)); l.erase(unique(ALL(l)), l.end());
#define CONTAIN(a, b) find(ALL(a), (b)) != (a).end()
#define array2(type, x, y) array<array<type, y>, x>
#define vector2(type) vector<vector<type> >
#define out(...) printf(__VA_ARGS__)
#define MAX LONG_LONG_MAX

int dxy[] = {0, 1, 0, -1, 0};

/*================================*/

int B,C,D;
int MOD = 1000000007;

// mod. m での a の逆元 a^{-1} を計算する
long long modinv(long long a, long long m) {
    long long b = m, u = 1, v = 0;
    while (b) {
        long long t = a / b;
        a -= t * b; swap(a, b);
        u -= t * v; swap(u, v);
    }
    u %= m;
    if (u < 0) u += m;
    return u;
}

signed main()
{
#if DEBUG
    std::ifstream in("input.txt");
    std::cin.rdbuf(in.rdbuf());
#endif
    cin>>B>>C>>D;
    
    if (C==1) {
        cout << B * D << endl;
        return 0;
    }
    
    /*
     BC * (C^D - 1) * (C - 1)^(-1)
     */
    int ans = ((B % MOD) * (C % MOD)) % MOD;
    int i = 1;
    int CC = 1;
    int CM[100];
    CM[0] = C;
    if (D & 1) CC = (CC * CM[0]) % MOD;
    while (((long long)1 << i) <= D) {
        CM[i] = (CM[i-1] * CM[i-1]) % MOD;
        if (D & (long long)1<<i) CC = (CC * CM[i]) % MOD;
        i++;
    }
    ans = ans * (CC - 1) % MOD;
    ans = ans * modinv(C - 1, MOD) % MOD;
    
    cout << ans << endl;

    return 0;
}