Round #547

Calculate the area of a rectangle with width 8 and length 13.

```csharp using System; class Program { static void Main() { // Define the width and length of the rectangle double width = 8; double length = 13; // Calculate the area of the rectangle double area = width * length; Console.WriteLine("The area of the rectangle is: " + area); } } ```

```csharp using System; public class Rectangle { public double Width { get; set; } public double Length { get; set; } public Rectangle(double width, double length) { Width = width; Length = length; } public double CalculateArea() { return Width * Length; } } class Program { static void Main() { Rectangle rectangle = new Rectangle(8, 13); double area = rectangle.CalculateArea(); Console.WriteLine($"The area of the rectangle is: {area}"); } } ``` This C# code defines a `Rectangle` class with properties for `Width` and `Length`, and a method `CalculateArea` to compute the area of the rectangle. In the `Main` method, an instance of `Rectangle` is created with the specified width and length, and its area is calculated and printed to the console. The output will be `The area of the rectangle is: 104`.