Round #1007

Compute the area of a circle with radius 7. Use pi to 2 decimal places.

```csharp using System; class Program { static void Main() { // Define the radius of the circle double radius = 7; // Calculate the area of the circle double area = Math.PI * Math.Pow(radius, 2); // Round the result to two decimal places area = Math.Round(area, 2); Console.WriteLine(area); } } ```

```csharp using System; public class CircleAreaCalculator { private const double Pi = 3.14; public static double CalculateCircleArea(double radius) { return Pi * Math.Pow(radius, 2); } public static void Main(string[] args) { double radius = 7; double area = CalculateCircleArea(radius); Console.WriteLine($"The area of the circle with radius {radius} is {area:F2}"); } } ``` This C# code calculates the area of a circle with a given radius using the formula A_circle = πr², where π is approximated to 2 decimal places as 3.14. The `CalculateCircleArea` method takes the radius as input and returns the calculated area. The `Main` method demonstrates how to use this method with a radius of 7 and prints the result to the console, rounded to 2 decimal places.