Tranny questions plz read and help SOS

http://www.automotiveforums.com/vbulletin/images/smilies/banghead.gifhey guys can someone plz tell me what the gear ratios in the tranny stand for and how to read/convert them into pretty close to accurate speeds plz noone call me dumb or stupid i'd like you to go as indepth as possible to help me out (and yes i know tires and wheels are factors) plz help links, pm's, or long posts would be greatly appreciated.http://www.automotiveforums.com/vbulletin/images/smilies/banghead.gif (if your a chevy person disregard the peeon chevy thingy)

its all on http://auto.howstuffworks.com