Division affects numbers by splitting them up into neat little groups.
For example, we can say we have 68 marbles and want to split them into 4 piles. For this, we can make the division problem 68 / 4 = ?
In this example, we are saying that we are splitting 68 marbles into 4 even groups. If we are doing it evenly, how many marbles are in each pile?
68 / 4 = 17
There are 17 marbles in each of the 4 piles. We can check our work by adding:
17 + 17 + 17 + 17 = 68
And the math checks out.
Hope this helped =)