#include <iostream>
#include <string>
#include <math.h>
#include <algorithm>
#include <vector>
#include <queue>
#include <stack>
#include <cstdlib>
#include <string.h>
using namespace std;

int main()
{
    long long n, k;
    cin >> n >> k;

    for (int i = 0; i < k; i++)
    {

        if (n % 200 == 0)
            n = n / 200;
        else
        {
            string str = to_string(n);
            str = str + "200";
            n = stoll(str.c_str());
        }
    }

    cout << n;

    return 0;
}
#include <bits/stdc++.h>
using namespace std;

int main(){
  double a, b;
  cin >> a >> b;
  
  cout << a * b / 100 << endl;
}