Is it possible to make the player himself able to enter numbers into the console?

The essence of the problem is that I need to make the player figure out the number, do some manipulations with it to get the second number, and I have to guess the first. And for this I need to make it so that he can enter his second number into the console (it is three-digit).
If this is not possible, then could you suggest a different solution.
I apologize in advance for my broken English and stupid question.,The essence of the problem is that I need to make the player figure out the number, do some manipulations with it to get the second number, and I have to guess the first. And for this I need to make it so that he can enter his second number into the console (it is three-digit).
I apologize in advance for my broken English and stupid question.

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