#include <iostream>
#include <string>
#include <iomanip>


using namespace std;

int main() {
    double levove = 1;
    double dolari = 1.79549;
    double evro = 1.95583;
    double payndove = 2.53405;

    string BGN = "BGN";
    string USD = "USD";
    string EUR = "EUR";
    string GBP = "GBP";

    string input_money;
    string new_currency;

    double ammount;
    cin >> ammount;
    cin >> input_money;


    if (input_money == BGN) {
        ammount = ammount * levove;
    }
    else if (input_money == USD) {
        ammount = ammount * dolari;
    }
    else if (input_money == EUR) {
        ammount = ammount * evro;
    }
    else if (input_money == GBP) {
        ammount = ammount * payndove;
    }


    cin >> new_currency;
    if (new_currency == BGN) {
        ammount = ammount / levove;
    }
    else if (new_currency == USD) {
        ammount = ammount / dolari;
    }
    else if (new_currency == EUR) {
        ammount = ammount / evro;
    }
    else if (new_currency == GBP) {
        ammount = ammount / payndove;

    }

    printf_s("%.2f", ammount);

    return 0;
}