[R-390] Slide rule calculations

[Barry]

> In the end, 3.12/9.7 is NOT 0.321649484536....    It is 0.32.  Digits  
> of precision in = digits of precision out.  This, of course, applies  
> equally to sliderule calculations,  electronic calculator thingies, or 
> computers with 128-bit  or more floating point arithmetic.
> 
> Grant/NQ5T

That's one of those rules that I first came across in college physics class and I struggled with it then as now.

I understand basiclly why it is used, but by the same rule, is 1/3=0?

Barry - N4BUQ