#include <bits/stdc++.h>
using namespace std;
 
int main() {
    // Input: sudut (derajat) kemudian kecepatan awal v (m/s)
    double angle_deg, v;
    if (!(cin >> angle_deg >> v)) return 0;
 
    const double g = 10.0; // sesuai asumsi
    const double pi = acos(-1.0);
 
    double angle_rad = angle_deg * pi / 180.0;
    double range = (v * v * sin(2.0 * angle_rad)) / g;
 
    // Cetak dengan 1 angka di belakang koma
    cout.setf(ios::fixed);
    cout << setprecision(1) << range << endl;
    return 0;
}

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37 10