Making a demon do basic math (add, subtract, multiply, parentheses)
Obviously, as an accountant, Steve wants to add and subtract numbers. To do actions such as these, Steve doesn’t even need to summon demons; all summoners are inherently able to perform cantrips as a free action, and so do not need to summon demons in order to perform math. For example, in order to add 3 and 5, Steve, only needs to type
3 + 5
And the demonic interface will tell him what the result will be. Steve, however, want to work with the numbers that he has given Bob. In order to do so, he needs to give Bob the location of the number.
Steve can the use the corresponding number by telling Bob its corresponding number. Unfortunately, the demonic counting system starts out at zero. On the flip side, demons have now adopted roman numerals, so those can be used to access numbers.