Creating a math task

Win10
PsychoPy version 3

Hello,
I would like to know if I can create a math task (e.g., 45+28 ), and I want my participants to type the answer (numbers).
I tried to put numbers in the Keyboard instead of alphabets. But it didn’t work. It seems I need coding for this kind of task.

Are there any sources or video clips that might be useful?