static void Main(string[] args) { try { InputConverter inputConverter = new InputConverter(); CalculatorEngine calculatorEngine = new CalculatorEngine(); double firstNumber = inputConverter.ToNumber(Console.ReadLine()); double secondNumber = inputConverter.ToNumber(Console.ReadLine()); string operation = Console.ReadLine(); double result = calculatorEngine.Calculate(firstNumber, secondNumber, operation); Console.WriteLine(result); } catch (Exception ex) { // TODO: start logging exceptions Console.WriteLine(ex.Message); } }