One CD or three hundred and sixty pies
A pie is a kilo of coke (Coleman, 1998).
Perhaps Hov is comparing his yearly output, having said 365 in the previous line. The Blueprint was his 5th (6th in you count The Dynasty) album in 5 years. He may be implying he sold 360 kilos a year in his former profession.
Or Jay is alluding to the fact that, to make the same money he makes off a CD, he’d have to sell 360 kilos of cocaine. Jay has claimed making $40K per kilo (in another rapping vs trapping comparison), and $40K times 360 is $14,400,000.
Another interpretation holds that 360 is chosen because “pi” has to do with circles and there are 360 degrees in a circle
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