import java.util.*;

public class Main {
  static long MOD = (long)Math.pow(10, 9) + 7;
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long b = sc.nextLong() % MOD;
    long c = sc.nextLong() % MOD;
    long d = sc.nextLong();
    long s = func(c, d + 1);
    s = (s + MOD - c) % MOD;
    long t = func(c - 1, MOD - 2);
    long ans = (s * t) % MOD;
    ans = (ans * b) % MOD;
    System.out.println(ans);
  }

  public static long func(long a, long x) {
    if(a == 0) return 0;
    if(x == 0) return 1;
    if(x % 2 == 0) {
      long t = func(a, x / 2);
      return (t * t) % MOD;
    } else {
      long t = func(a, (x - 1) / 2);
      t = (t * t) % MOD;
      return (a * t) % MOD;
    }
  }
}