private static void ShowSumOfNumbers()
{
Console.Write("Insert the number: ");
int number = СheckInputNumber();
NumberOperations sumOfNumbers = new NumberOperations();
Console.WriteLine($"Amount = {sumOfNumbers.GetSumOfNumbersMultiplesOf(number, new int[] { 3, 5 })}");
Console.WriteLine();
}
private static void ShowRectangle()
{
Console.WriteLine("Enter width");
int width = СheckInputNumber();
Console.WriteLine("Enter length");
int heigth = СheckInputNumber();
NumberOperations rectangle = new NumberOperations();
rectangle.ShowAreaOfRectangel(width, heigth);
Console.WriteLine();
}
