#include<bits/stdc++.h>
using namespace std;
#define NUM 11
int main(void){
    long long N, M; cin >> N >> M;
    while(true){
        if(N / M < 1000) {
            cout << 0 << endl;
            break;
        }
        if(N % M == 0) {
            cout << N / M << endl;
            break;
        }
        N = N/(M*1000);
        
        cout << N * 1000 << endl;
        break;
    }
    return 0;
}