using System.Numerics;
using System;

public class Hello
{
    public static int MOD = 1000000007;
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var b = long.Parse(line[0]);
        var c = long.Parse(line[1]);
        var d = long.Parse(line[2]);
        getAns(b, c, d);
    }
    static void getAns (long b, long c, long d)
    {
        if (c == 1)
        {
            var res0 = b % MOD;
            res0 *= d;
            res0 %= MOD;
            Console.WriteLine(res0);
            return;
        }
        BigInteger res = b % MOD;
        res *= c;
        res %= MOD;
        BigInteger t = BigInteger.ModPow(c, d, MOD) - 1;
        res *= t;
        res %= MOD;
        var t2 = ModInverse(c - 1, MOD);
        res *= t2;
        res %= MOD;
        Console.WriteLine(res);
    }
    public static BigInteger ModInverse(BigInteger a, BigInteger m)
    {
        return BigInteger.ModPow(a, m - 2, m);
    }
}