"Rudi Menter" <spamcowgirl@spamgourmet.com> wrote in message 
news:43c524cf$0$20780$9b4e6d93@newsread4.arcor-online.net...
> c*c=cc=const
>
> Let cc=d then
>
> E=mcc=md, or,
> using another system of units c=cc=1
> E=m

ok, so you can type letters..
Do you have an answer?
BTW
c=cc=1 is completely wrong unless you are using c=1 only.
variables should be variable.
:)