#include <bits/stdc++.h>
using namespace std;

int main() {
  double A, B;
  cin >> A >> B;
  double ans = 0;
  ans = A * B / 100;
  cout << ans << endl;
}
#include <bits/stdc++.h>

#define ll long long
#define fo(a,b,c) for(int a=b;a<=c;a++)

using namespace std;

int main()
{
    int n,k;
    cin>>n>>k;
    int c=n,d=k;
    int a=0,b=0;;
    while(n){
        a+=n;
        n--;
    }
    while(k){
        b+=k;
        k--;
    }
    b*=c;
    a*=d;

    cout<<a*100+b;
    return 0;
}
