Why bother with the EMU when we have nanometers (or some small multiple thereof)? Even 1/64 inch, 1 PostScript point, or 1 traditional point are an integral number of nanometers.

There are 7200 / 254 = 3600 / 127 PostScript or CSS points and 7227 / 254 TeX points in a centimetre. Neither of those is a finite decimal fraction.

And that's what I get for not checking that my calculator was rounding on me. Apologies. (And I even used the good calculator, too, so I wouldn't screw up the units....)