C

#include <iostream>
#include <limits>
using namespace std;

int main() {
	double obsah;
	double diery;
	cin>>obsah;
	cin>>diery;
	double vysledok = obsah+((obsah/(100-diery))*diery);
	cout.precision(20);
	cout << fixed << vysledok <<endl;
	return 0;
}