interface Calculatable{
            public void SqrArea(int side);
            public void RectArea(int length,int Breadth);
}

public class AreaCalc implements Calculatable {

            public void SqrArea(int a){
                        int b;
                        b=a;
                        int area=b*b;
                        System.out.println("Area of square"+ area);
            }
            public void RectArea(int l,int b){
                                    int a,c;
                                    a=l;
                                    c=b;
                                    int area=a*c;
                                    System.out.println("Area of Rectangle"+ area);
            }
            public static void main(String args[])
            {
                        AreaCalc cal=new AreaCalc();
                        cal.SqrArea(4);
                        cal.RectArea(4,5);
            }