#include<iostream>
#include<string>
#include<algorithm>
#include<cmath>
#include<math.h>
#include<iomanip>
#include<stdio.h>
#include<random>
#include<ctime>
#include<cstdlib>
using namespace std;

int main(){

  long long int n;
  int m;
  cin >> n >> m;
  m*=1000;

  n/=m;
  n*=1000;
  cout << n << endl;

  return 0;
}