hi,
how can you {add,multiply,negate,divide} two scalars in TeX/LaTeX?
in a new command that i am writing (it places a \picture), i want to
use one of the two arguments (width) and \linewidth or \textwidth to
calculate the remaining horizontal space i have (for another picture).
i know i can convert a #1 argument of a command into a \length with
\newlength\setlength, but how can i mathematically combine multiple
\lengths? i know it's possible, though maybe not on the LaTeX level.
any clues?
martin; (greetings from the heart of the sun.)
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