So, I'll do my best to explain what (hypothetically) might work...
If you divide for example 8 ÷ 4. Division is basically subtracting (from the dividend) until the number is less then the second number (divisor). So what you could do is have a circuit that loops through itself until a condition is met, then ending the loop and outputting a result. Here's a step-by-step guide to how it (could) work:
Input A = 8 and Input B = 4
So take 4 (B) from 8 (A) and then add one to C (now 1), so A is now 4 and B is still 4.
Then if A (now 4) is less then B (4) we would stop. But A (4) is not less then B (4), SO! We can do another subtraction so A is now 0 and B is 4, and we add one to C (now 2).
So A (8) ÷ B (4) = C (2), and we would output C (2).
So we could input our two numbers (A & B) and loop through a Subtraction Circuit, checking each time if A is less then B, and if so we stop the loop, and output or C (answer). Now this would take a lot of work, but seems possible.
But if you wanna do something easier (but bulkier) you could chain-together a bunch of subtractions (adding 1 to a counter every circuit), and check each time if it is less then, and if so stopping the chain and outputting a result.
I hope all of this makes sense. And if it does, hope it helps.
