From: Giampiero Zanchi <cidza@...>
Date: 2010-04-29T23:38:33+09:00
Subject: Re: flt gem for arbitrary precision

you can find the section

DecNum vs BigDecimal

at the bottom of the documentation page

http://flt.rubyforge.org/

DecNum solves some of the difficulties of using BigDecimal.

One of the major problems with BigDecimal is that it‘s not easy to 
control the number of significant digits of the results. While addition, 
subtraction and multiplication are exact (unless a limit is used), 
divisions will need to be passed precision explicitly or else an 
indeterminate number of significant digits will be lost. Part of the 
problem is that numbers don‘t keep track of its precision (0.1000 is not 
distinguishable from 0.1.)

.....
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