/** * @FileName a.cpp * @Author kanpurin * @Created 2020.05.30 01:34:55 **/ #include "bits/stdc++.h" using namespace std; typedef long long ll; constexpr int MOD = 1e9 + 7; struct mint { private: long long x; public: mint(long long x = 0) : x((MOD + x) % MOD) {} mint(std::string& s) { long long z = 0; for (int i = 0; i < s.size(); i++) { z *= 10; z += s[i] - '0'; z %= MOD; } this->x = z; } mint& operator+=(const mint& a) { if ((x += a.x) >= MOD) x -= MOD; return *this; } mint& operator-=(const mint& a) { if ((x += MOD - a.x) >= MOD) x -= MOD; return *this; } mint& operator*=(const mint& a) { (x *= a.x) %= MOD; return *this; } mint& operator/=(const mint& a) { long long n = MOD - 2; mint u = 1, b = a; while (n > 0) { if (n & 1) { u *= b; } b *= b; n >>= 1; } return *this *= u; } mint operator+(const mint& a) const { mint res(*this); return res += a; } mint operator-(const mint& a) const { mint res(*this); return res -= a; } mint operator*(const mint& a) const { mint res(*this); return res *= a; } mint operator/(const mint& a) const { mint res(*this); return res /= a; } friend std::ostream& operator<<(std::ostream& os, const mint& n) { return os << n.x; } bool operator==(const mint& a) const { return this->x == a.x; } }; int main() { string s; cin >> s; int m; cin >> m; /*vector< vector< mint > > dp(s.size() + 1, vector< mint >(m, 0)); dp[0][0] = 1; mint zero_cnt = 0; for (int i = 0; i < s.size(); i++) { if (s[i] == '0') { zero_cnt += dp[i][0]; dp[i + 1] = dp[i]; continue; } for (int j = 0; j < m; j++) { dp[i + 1][(j * 10 + s[i] - '0') % m] += dp[i][j]; dp[i + 1][j] += dp[i][j]; } } cout << dp[s.size()][0] + zero_cnt - 1 << endl; */ vector< mint > dp1(m, 0); dp1[0] = 1; mint zero_cnt = 0; for (int i = 0; i < s.size(); i++) { if (s[i] == '0') { zero_cnt += dp1[0]; continue; } vector dp2(m, 0); for (int j = 0; j < m; j++) { dp2[(j * 10 + s[i] - '0') % m] += dp1[j]; dp2[j] += dp1[j]; } dp1 = dp2; } cout << dp1[0] + zero_cnt - 1 << endl; return 0; }