ここにどのくらいいるんですか？
How long are you staing here ?

I want to go to the University of Sydney.
How can I get there ?
I recommended taking the train.
What's the name of the station.
It's Central Station.

How long are you staying here ?
For four more day.
Well, in that case, I'd say 20 dollars should be enough.

That's all right.