#include <bits/stdc++.h>

using namespace std;

int main()
{
    char chr;
    int n;
    cin >> chr >> n;
    switch (chr)
    {
    case 'P':
        cout << n * 0.7 << endl;
        break;
    case 'G':
        cout << n * 0.8 << endl;
        break;
    case 'S':
        cout << n * 0.9 << endl;
        break;

    default:
        cout << n * 0.95 << endl;
        break;
    }
    return 0;
}