class Shape {
    int x, y;
}

class Circle extends Shape {
    int radius;

    public Circle(int radius) {
        this.radius = radius;
        x = 0;
        y = 0;
    }

    double getArea() {
        return 3.14 * radius * radius;
    }
}

public class CircleTest {
    public static void main(String args[]) {
        Circle obj = new Circle(10);

        System.out.println("원의 중심: (" + obj.x + ", " + obj.y + ")");
        System.out.println("원의 면적: " + obj.getArea());
    }
}