i got a tribulus product

Tribosten - Protodioscin Delivery System

now i see people sayin they run tribulus at 3 grams a day for 2 months, on tha box it says tribulus terrestris extract 250mg/tab, if i ran it at 3 grams a day thatd be like 40$ every 5 days, tha box only comes w/ 60 tablets

now on tha box it says take 1 to 2 tabs 3 times a day

my question is what dosage should i run this at