using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;
using System.Runtime.Intrinsics.Arm;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var sr = double.Parse(ReadLine());
        var lr = double.Parse(ReadLine());
        var theta = Math.Asin(sr / lr);
        var rad = 2 * Math.PI - 2 * theta;
        WriteLine(rad);
        WriteLine(2 * lr * sr * rad + Math.PI * sr * sr);
    }
}