class Area{
static double area(double r){
	   return Math.PI*r*r;
}
static double area(double l,double w){
	   return l*w;
}
public static void main(String args[]){
	    double circle;
	    circle=area(10);
	    System.out.println("뾶Ϊ10Բ:"+circle);
	    double rectangle;
	    rectangle=area(10,20);
	    System.out.println("Ϊ10Ϊ20ľ:"+rectangle);
}
}