import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

class fang
{
	int chang;
	int kuan;
	int gao;
 fang(int chang,int gao,int kuan)
	{
		this.chang=chang;
		this.kuan=kuan;
		this.gao=gao;
	}
}
class mian extends fang
{
	int mian1;
	int mian2;
	int mian3;
mian(int chang,int gao,int kuan)
	{
		super(chang,gao,kuan);
		this.mian1=chang*kuan;
		this.mian2=chang*gao;
		this.mian3=gao*kuan;
	}
}
class tiji extends fang
{
	int tiji;
   tiji(int chang,int gao,int kuan)
	{
		super(chang,gao,kuan);
		this.tiji=chang*gao*kuan;
	}
}
public class chang
{
public static void main(String args[])
{
	int chang,kuan,gao;
	System.out.println("請輸入三個數：");
	try{
	BufferedReader keyin=new BufferedReader(new InputStreamReader(System.in));
	chang=Integer.parseInt(keyin.readLine());
	kuan=Integer.parseInt(keyin.readLine());
	gao=Integer.parseInt(keyin.readLine());
	mian mi=new mian(chang,kuan,gao);
	tiji ti=new tiji(chang,kuan,gao);
	System.out.println("第一個面的面積是："+mi.mian1);
	System.out.println("第二個面的面積是："+mi.mian2);
	System.out.println("第三個面的面積是："+mi.mian3);
	System.out.println("長方體的體積是:"+ti.tiji);
	}
	catch(IOException e){}
}
}