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If you want to keep your custom formatting and not switch to BigInteger, there might be a viable way to divide by using your existing addition and subtraction operators.

Since your values are stored in a list of integers, you should run through that list for each number and perform long divison. I'm on my phone so I can't provide a code example, but the logic is somewhat straightforward.

https://en.wikipedia.org/wiki/Long_division

Let's say the calculation is 300/20

First step is to find the first subset of 300 that is equal to or larger than the 20. That will be 30.

Then you find the qoutient and calculate the remainder, which is 1 and 10 respectively.

You then append the next number from the 300 (which is a 0) to the remainder (10). This will give you 100. Then you do the same thing resulting in a qoutient of 5 and remainder of 0.

The remainder being zero means that the calculation is complete. Then you append all the qoutients you've calculated and you have the result ("1" + "5" = "15")

For finding the qoutient and remainder you can use Euclidean Division that also only uses your existing addition and subtraction operators. https://en.wikipedia.org/wiki/Division_algorithm N / D = (Quotient, Remainder)

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