Look at how intent these fellows are. In their imagination, all Vince had to do was multiply 6 numbers. Multiplying is multiplying, right? You have to get the same answer... Only they had no idea that we would actually ask about their assumptions before handing over the cash.
This is a typical negotiation scene. Ultimately we calculated that possible oil reserves were about 15% of their bs Russian number. These fellows were not happy after that!