Why are basic facts needed when dividing large numbers?

Do you mean basic math ... like 2 x 5 and 64/8 and stuff? bc if you are, then its important bc if you dont know basic math then 1. you're going to have a lot of trouble figuring out the answer 2. you're going to take forever solving the problem but, im not saying to not take your time on a question and stuff but most people are impatient to wait for others so they will probably get annoyed and mad at you. There are also a whole lot of other reasons ...

Well because it's because your dividing large number also when you divide large numbers you need basic facts