// statements_return.cs
using System;
class ReturnTest 
{
    static double CalculateArea(int r) 
    {
        double area = r * r * Math.PI;
        return area;
    }

    static void Main() 
    {
        int radius = 5;
        Console.WriteLine("The area is {0:0.00}", CalculateArea(radius));
    }
}