Why does Sololearn not accept this?

Question

Answered; thank you!

Hi! I'm trying to complete a task for the solo learn java course (specifically the one about abstract classes called "Shape", however every time I run my program, all the test cases are correct except for No. 3 (a hidden test case). Please could you help by suggesting a bug fix in the code below? Thanks! (the bug is not inputting a double value and changing it to an int, I have tried this fix and it did not work.)

import java.util.Scanner;

abstract class Shape {
int width;
abstract void area();
}
//your code goes here

class Circle extends Shape{
Circle(int x){
width = x;
}
public void area(){
System.out.println(width*width*Math.PI);
}
}

class Square extends Shape{
Square(int y){
width = y;
}
public void area(){
System.out.println(width*width);
}
}

public class ProgramforSolo {
public static void main(String[ ] args) {
Scanner sc = new Scanner(System.in);

int x = sc.nextInt();
int y = sc.nextInt();

Square a = new Square(x);
Circle b = new Circle(y);
a.area();
b.area();
}
}

Answer 1

Use
Math.PI * width * width
Instead of
width * width * Math.PI
(There you get slite difference in result)