import java.io.*;
import java.util.*;
import java.math.*;

class Area {
    public static void main(String args[]) {
        int side, length, breath;
        Scanner s = new Scanner(System.in);
        System.out.println("enter the value of side");
        side = s.nextInt();
        System.out.println("enter the value of length");
        length = s.nextInt();
        System.out.println("enter the value of breath");
        breath = s.nextInt();
        RectArea r = new RectArea();
        TriArea t = new TriArea();
    }
}

class RectArea extends Area {
    RectArea() {
        int area1 = (length * breath);
        System.out.println("value of the rectangular area is:" + area1);
    }
}

class TriArea extends Area {
    TriArea() {
        float height = ((side / 2) * 1.732);
        float area2 = ((height * side) / 2);
        System.out.println("value of the triangle area is:" + area2);
    }
}