#include<bits/stdc++.h> using namespace std; int main(){ int a; char b; cin>>b>>a; if(b=='P')printf("%.2lf\n",a*0.7); else if(b=='G')printf("%.2lf\n",a*0.8); else if(b=='S')printf("%.2lf\n",a*0.9); else printf("%.2lf\n",a*0.95); return 0; }