#include <iostream>

#include <cmath>

using namespace std;

int main() {

    int q;

    const double p = 23.34;

    cin >> q;

    double t = (double)q * p;

    int r = (int)round(t * 100.0);

    cout << r / 100 << "." << (r % 100 < 10 ? "0" : "") << r % 100 << endl;

    return 0;

}