A.cpp

/*****                                            
 *                                                   __Bismillahir Rahmanir Rahim__
 *                                          American International University Bangladesh (AIUB) 
 *                                                         Hadiur Rahman Nabil
                                                                 
                                                               
                                                          
*****/
#include <bits/stdc++.h>
using namespace std;


 



int main()
{
    
    int a,b;
    float c,d;
    cin>>a>>b;
    c=(a*b);
    d=c/100;
    cout<<d<<endl;
  
return 0;

}