public Task Iterate()
{
_logger.LogDebug("Iteration started");
var loan = GetLoanInfo();
_logger.LogDebug("Calculation starting");
var payments = _calculator.Calculate(loan);
_logger.LogDebug("Calculation finished");
_view.Write("Calculated payments:");
_view.Write(payments?.JsonStringify() ?? "Incorrect input parameters (amount, downpayment).");
_needRepeat = _view.NeedRepeat();
_logger.LogDebug("Iteration finished");
return(Task.CompletedTask);
}