Long addition can be done "digit by digit" when you stack the numbers, being sure to carry and align them at their decimal places.
Long subtraction can be done digit by digit when you stack the numbers, again aligning them by decimal point and borrowing as necessary.
Long multiplication can be done digit by digit too.
What about long division? So for example, 67 divided by 4, the 4 goes under the 67 and they are aligned against the right side. What process do you follow? It would have to work for long numbers, like 746 divided by 105.
Getting the answer as a quotient + remainder is okay, as the remainder can be taken over the divisor for the final fraction and left that way.
(Yes I know how to do traditional long division, where the dividend goes inside the division box and you start writing the quotient above that, multiplying each digit of the quotient by the entire divisor, subtracting, bringing down the next digits, repeat. I want to know why addition, subtraction, and multiplication allow you to perform that operator one digit at a time, yet apparently division does not.)