static void Main(string[] args) { try{ InputConverter inputConverter = new InputConverter(); CalculatorEngine calculatorEngine = new CalculatorEngine(); double firstNumber = inputConverter.ConverInputToNumberic(Console.ReadLine()); double secondNumber = inputConverter.ConverInputToNumberic(Console.ReadLine()); string operation = Console.ReadLine(); double result = calculatorEngine.Calculate(operation, firstNumber, secondNumber); Console.WriteLine(result); } catch (Exception ex) { //In real worl we would want to log this message Console.WriteLine(ex.Message); } }