public static void Main()
Console.Write("Enter the length of the box (cm):");
L=double.Parse(Console.ReadLine());
Console.Write("Enter the width of the box (cm):");
W=double.Parse(Console.ReadLine());
Console.Write("Enter the height of the box (cm):");
H=double.Parse(Console.ReadLine());
Console.WriteLine("The size of the box (cm³):{0}",TheS);