How to split numbers in assembler in AVR?

Question

Microcontrollers

And how can one implement division of numbers with a fractional point?

Answer 1

Dividing two numbers at the micro level is a whole science.
Read books .

Answer 2

Any number in binary form can be represented as a number series:
The essence of the division algorithm is to divide one number series into another number series.
Implement the algorithm in any convenient high-level language, and then easily rewrite it in assembler.