/* -*- coding: utf-8 -*-
 *
 * 1177.cc:  No.1177 余りは? - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MOD = 1000000007;

/* typedef */

typedef long long ll;

/* global variables */

/* subroutines */

/* main */

int main() {
  int p, k;
  scanf("%d%d", &p, &k);

  int q = 0, r = 1;
  for (int i = 1; i < p; i++) {
    int d = r * 10;
    q = ((ll)q * 10 + d / p) % MOD;
    r = d % p;
  }
  //printf("q=%d, r=%d\n", q, r);

  if (r >= k) q = (q + 1) % MOD;
  printf("%d\n", q);
  return 0;
}