#include <iostream>
using namespace std;

int main()
{
    int length, width, area; 
	length = 10;
    width = 20;
    area = length*width;
    
    cout << area << endl; 
    
    
    
    cout << "The size of 10 is "<< sizeof(length)<< " byte" << endl;
    cout << "The size of 20 is " << sizeof(width) << " byte" << endl;
    cout << "The size of area is " << sizeof(area) << " byte" << endl;
    
		
    return 0;
}