For this Friday's fun, I offer you a second chapter of Classical Greek according to the Natural Method. This week includes some very complex numbers, but you should find it quite manageable apart from that.
This download is a revised pdf of chapters 1 and 2:
I will, at some point, provide a compiled version of the individual chapters.
In the meantime, if you want some help with very large Greek numbers, I found this page quite apt (scroll to the lower half for Ancient Greek).