public override Task <CalcResponce> GetAnswer(CalcRequest request, ServerCallContext context)
        {
            Console.WriteLine("New request:");
            IRPN        manager    = new RPN();
            ICalculator calculator = new Calculator();

            var LFK = manager.LengyelFormaKonvertalas(request.Formula);

            Console.WriteLine(LFK);

            var result = calculator.Calculate(LFK);

            Console.WriteLine(result);

            return(Task.FromResult(new CalcResponce()
            {
                Answer = result
            }));
        }