When you divide 18 by 2, the result is 9. This is because division is the process of splitting a number into equal parts. In this case, 18 is split into 2 equal parts, each part being 9.
Mathematically, this can be represented as:
18 ÷ 2 = 9
This means that if you have 18 items and you want to divide them equally among 2 groups, each group will have 9 items.