static void multiplyMenu()
{
Console.Clear();
var num1 = getValidNumber("1");
Console.Clear();
var num2 = getValidNumber("2");
Console.Clear();
var result = $"\n\t {num1.ToString()} times {num2.ToString()} is {(MathOperations.multiply(num1, num2)).ToString()}\n\n";
Console.Write(result);
Console.WriteLine("Press any key to continue ");
var optionErr = Console.ReadLine();
Main(null);
}