#include <bits/stdc++.h>
using namespace std;
#define int long long
#define double long double
signed main(){
  double A;
  int B;
  cin>>A>>B;
  double t= A*B;
  int l=0,r=1e6;
  while(r-l > 1){
    int mid = (l+r)/2;
    if(mid > t+0.0000000001) r = mid;
    else l = mid;
  }
  cout<<l<<endl;
}