hey there. We use this "//" division cause it returns an integer which suits the situation.
If we wanted a float answer we'd use "/" but in this case we cannot prepare "1.5" cakes, get it ?
So it would round 1.5 to simply 1 cause that's the actual number of complete cakes that we can prepare.
Hope this helped.

floor division. ex. 800 / 400 will return 2.0, which is a float number