Oh well, if you don't take my word for this, simply look at the boeing FCTM! In the first chapter under command speed it will give you some sample calculations.
DHARDESTHARD, Use the automatics to come up with the answer?? Seriously dude, if you are a simmer or made a joke, you had me! If not, get out of the flying business!
PEI 3721, very sensible, also to be applied to take off calculations, but you knew this