#include <iostream>
using namespace std;

class hcn
{
private: 
	float chieudai, chieurong;
public:
	void nhap()
	{
		cout << "nhap vao chieu dai:= ";
		cin >> chieudai;
		cout << "nhap vao chieu rong:= ";
		cin >> chieurong;
	}
	void xuat()
	{
		cout << "DIEN TICH LA: " << chieudai * chieurong << endl;
	}
	
};

int main()
{
	hcn b;
	b.nhap();
	b.xuat();
	system("pause");
}