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