I used the calculator and it said 22.5 so idk exactly its either 22 or 23. Hope this Helps! :P
If each van can only hold 8 of the 185 students, you are dividing the students into groups of 8. So you are dividing 185/8 and you get 23.125. Now you can't have .125 of a van, so you need 24 vans to hold all the kids.