Nearly.
Try again.
What, are you a monkey? Can't you understand plain english? Or has the north american sewage polluted your brains?
The guy has a 21 Arabic petro(l) dollar gift card and wants to trade it for cash 10 Arabic petro(l) dollar.
And if you want to trade for something else, at least ask for petrol (that means oil!) on wich your whole fake petro fiat dollar is based on in the first place.
Or you can join BRICS and drag yourselves out of westeren poverty.
I just want to teach you and the likes of you how not to be arrogant