import java.util.Scanner;
public class volumeOfCone
{
    public static void main(String args[])
    {
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter radius of sphere");
        double radius=sc.nextDouble();
        System.out.println("Enter height of sphere");
        double height=sc.nextDouble();
        double pie=22/7;
        double volume=pie*(radius*radius)*height/3;
        System.out.println("Volume of the cone="+volume);
     }
}