#include <iostream>
#include <string>
using namespace std;
int main(){
  double v,t;
  cin>>v>>t;
  double x=v;
  v*=t;
  double v2=v;
  v2*=10;
  string s=to_string(v);
  for(int i=0; i<s.size(); ++i){
    if(s[i]=='.') break;
    cout<<s[i];
  }
  cout<<endl;
  return 0;
}