python rounding problem.

[Dan Bishop]

Grant Edwards wrote:
...
> Did they actually have 60 unique number symbols and use
> place-weighting in a manner similar to the arabic/indian system
> we use?

The Bablyonians did use a place-value system, but they only had two
basic numerals: a Y-like symbol for 1 and a <-like symbol for ten.
These were combined to make base-60 digits.  For example, 59 was
represented by

  <   YYY
 < <  YYY
< <   YYY

Zero (used as a placeholder, but not as a number in itself) was
represented by a space.