• + 1 comment

    it means remaining wrappers

    if you have 5 wrappers and you exchange 4 wrappers for 1 chcocolate.

    You will left with 5//4 =1 wrapper + 5%4= 1 wrapper

    4 wrappers exchanged out of 5. 1 leftover. 1 new choclate which leaves us with 1 more wrapper.