Hi style,
Thanks for your interest in syncfusion product.
You can navigate through the numeric buttons using arrow keys. But let us know how you are using the calculator. Are you placing it in combodropdown. Could you provide us the scenario of how you are using the Calculator control. We have attached the sample containing the calculator.
Please let us know if you have any question.
Thanks,
Rajasekar
Calculator_aa4fddd9.zip