The traveler's gold
A traveler had to pay for a week's stay (7 days) in a hotel, with only one gold bar to pay.
The hotel owner challenged the traveler to accept the gold payment. The proposal was as follows:
"I accept the gold payment. However, you will have to pay one night at a time, and you can only cut the bar twice."
How should the traveler cut the bar to make the payment?
* Challenge submitted by user Nilton Alves Neto.