Calculate two questions

Hi

I’m trying to combine two questions and calculate them. I want to show calculation result in Dashboard.

I have two Questions.
Question A : total count of user records, refer from User table.
Question B : total count of order records, refer from Order table.
I want to show order counts per user.

Can I calculate two questions, like “Question B / Question A”?

Are the questions from two different databases? Or are the tables within the same database?

tables within the same database.