jaxashby tells the world how he is satisfied by his performance of a
simple physics problem, a performance so poor it would make a junior
high student wince with embarassment, yet he still feels qualified to
lecture others.
Ah, I see your problem. You have already substituted the accelleration
constant g into d=16t^2 and multiples of g were apparently not dealt
with properly. Use d=(1/2)at^2 and you might get better results.