This text is missing some spaces, please add them: ThenumbersbecameverylargeveryquicklybutIwouldkeepgoingquiteawhile.
The numbers became very large very quickly but I would keep going quite a while.
This text is missing some spaces, please add them: Followthestepswhichyoucanseeonthemainscreen
Follow the steps which you can see on the main screen
This text is missing some spaces, please add them: Thismeansthatyoucansaythattheycanceleachotheratspeedastheygoatdifferentspeedsondifferentroads(downanduptheroad).
This means that you can say that they cancel each other at speed as they go at different speeds on different roads (down and up the road).