2D Shapes Area

import java.util.*;
public class ShapeArea2D
{
    public static void main(String args[])
    {
        int choice=0;
        double l=0.0,b=0.0,h=0.0,r=0.0,s=0.0,result=0.0;
        Scanner sc=new Scanner(System.in);
        System.out.println("1-To calculate area of triangle");
        System.out.println("2-To calculate area of square");
        System.out.println("3-To calculate area of rectangle");
        System.out.println("4-To calculate area of circle");
        System.out.print("Enter your choice: ");
        choice=sc.nextInt();
        switch(choice)
        {
            case 1:
            {
                System.out.print("Height: ");
                h=sc.nextDouble();
                System.out.print("Base: ");
                b=sc.nextDouble();
                result=(b*h)/2;
                System.out.println("Area of triangle: "+result);
                break;
            }
            case 2:
            {
                System.out.print("Side: ");
                s=sc.nextDouble();
                result=s*s;
                System.out.println("Area of square: "+result);
                break;
            }
            case 3:
            {
                System.out.print("Length: ");
                l=sc.nextDouble();
                System.out.print("Breadth: ");
                b=sc.nextDouble();
                result=b*h;
                System.out.println("Area of rectangle: "+result);
                break;
            }
            case 4:
            {
                System.out.print("Radius: ");
                r=sc.nextDouble();
                result=(22/7)*r*r;
                System.out.println("Area of circle: "+result);
                break;
            }
            default:
            {
                System.out.println("Invalid choice");
            }
        }
    }
}