Com’on !! your questions are not stupid at all.
but you are really very very lazy. I’m sorry to be so harsh, and i don’t mean to be mean… but really…
Do you have any gprs background ?
do you understand the meaning of each counter Pxx in the formula ?
I let you find out by yourself 🙂
12 = ???
4.6666 = ???
such numbers are found ony once in GPRS/GSM.
Tomorrow evening i will answer 😛