Re: [Groff] Arithmetic of Units

[Anton Shepelev]

Michael Witten:

> 7i/2u    => ((7i)/2)u => 3.5iu <--- WTF?

Numeric  registers are dimentionless, and the speci-
fied unit of measurement only affects how the dimen-
tionless  value  it follows is to be scaled. In this
example:

    1. 7i = 7 * 240 = 1680 (because 1i = 240u),
    2. Then this value is divided by 2 yielding 840.
    3. Finally, 840 is left unchanged
       (because 1u=1u)

Anton