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