On 17.10.2008, at 20:17, cfrees at imapmail.org wrote:
> On Fri 17th Oct, 2008 at 10:15, Christopher Allen seems to have
> written:
>
>>> \usepackage{calc}?
>
> Too late, I know, but also
>
> \usepackage{fp}
you can also try the package xlop (doc only in french)
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