#include using namespace std; using ll = long long; using ld = long double; using ull = unsigned long long; using uint = unsigned int; using vi = vector; using vb = vector; using vd = vector; using vl = vector; using vvi = vector; using vvb = vector; using vvd = vector; using vvl = vector; #define REP(i,n) for(ll i=0; i<(n); ++i) #define FOR(i,b,n) for(ll i=(b); i<(n); ++i) #define ALL(v) (v).begin(), (v).end() #define TEN(x) ((ll)1e##x) template inline string join(const vector& vec, string sep = " ") { stringstream ss; REP(i, vec.size()) ss << vec[i] << ( i+1 == vec.size() ? "" : sep ); return ss.str(); } int main() { #ifdef INPUT_FROM_FILE ifstream cin("sample.in"); ofstream cout("sample.out"); #endif cin.tie(0); ios_base::sync_with_stdio(false); cout << fixed << setprecision(30); string s; ll m; cin >> s >> m; ll mod = TEN(9) + 7; vvl dp(s.size()+1, vl(m, 0)); // dp[s.size()][m][空か否か] REP(i, s.size()) REP(j, m) { if (s[i] != '0') dp[i + 1][(s[i] - '0') % m] = 1; (dp[i+1][(j*10 + (s[i] - '0'))%m] += dp[i][j]) %= mod; (dp[i+1][j] += dp[i][j]) %= mod; } cout << dp[s.size()][0] + count(ALL(s), '0') << endl; return 0; }