#include<iostream>
using namespace std;
int main()
{
    double num;
    cin >> num;
    string from, to;
    cin >> from >> to;
    cout.setf(ios::fixed);
    cout.precision(3);
    if (from == "mm" && to == "m") {
        cout << num / 1000 << endl;
    }
    else if (from == "m" && to == "mm") {
        cout << num * 1000 << endl;
    }
    else if (from == "m" && to == "cm") {
        cout << num * 100 << endl;
    }
    else if (from == "cm" && to == "mm") {
        cout << num * 10 << endl;
    }
    else if (from == "cm" && to == "m") {
        cout << num / 100 << endl;
    }
    else if (from == "mm" && to == "cm") {
        cout << num / 10 << endl;
    }
    return 0;
}