Why, when I input 42 to the circle constructor the area gives me 5541.769440932395 while the correct answer is 5541.769440932396

Question

import java.util.Scanner;

abstract class Shape {
int width;
abstract void area();
}

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

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

public class Program {
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

I wouldnt be too worried about the 16th decimal of the area of a circle unless you sre building a rocket ship

however this most likely has to do with how doubles work since it is limited by 16 deciamal digits and might not be able to round it correctly