For example 20 divide by 5 you would see how many times 5 can go into 20 so then you realize 5 goes into 20, 4 times. So to do division you must figure out the reverse of it so you must know how to multiply. You start by multiplying 5 times 1 and until you reach your answer. If you have a times table sheet. You must follow the number being divided into the bigger number until you see the big number.
Hope this helps.