#include <bits/stdc++.h>
using namespace std;
int main() {
double n, m, t;
cin >> n >> m;
t =(m/n)*5;
cout << fixed << setprecision(1) << t << " horas.";
return 0;
}
I2luY2x1ZGUgPGJpdHMvc3RkYysrLmg+CnVzaW5nIG5hbWVzcGFjZSBzdGQ7CgppbnQgbWFpbigpIHsKCWRvdWJsZSBuLCBtLCB0OwoJY2luID4+IG4gPj4gbTsKCXQgPShtL24pKjU7Cgljb3V0IDw8IGZpeGVkIDw8IHNldHByZWNpc2lvbigxKSA8PCB0IDw8ICIgaG9yYXMuIjsKCXJldHVybiAwOwp9