/*--------------------------------------------------
created by st10 at Wed Mar  3 14:48:42 PST 2010
--------------------------------------------------*/
#include <iostream>
#include <cmath>
using namespace std;


/*--------------------------------------------------
 Contract: rect_area : double double -> double
 Purpose: expects the length and width of a rectangle,
         and produces its area

 Examples: rect_area(3, 4) == 12.0
          rect_area(10, 20) == 200
--------------------------------------------------*/

double rect_area(double length, double width)
{
    return length * width;
}