Yeah, $290 billion if you use the NIMA system exchange rate or $250 billion if you use the free market exchange rate, Probably somewhere in between.
The IMF uses a US$1 = 42,000 rials exchange rate when they convert Iran's GDP figure which is calculated in rials by the central bank to the USD equivalent, The World Bank uses free exchange rates (US$1 = 280,000 rials) when they convert Iran's GDP figure (the same number) to the USD equivalent, The World Bank kinda explains this on their website:
So what you are doing makes sense? No