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------- Additional comments from [email protected] Wed May 12 04:52:47 +0000 
2010 -------
Ok.  Considering all our options, I think Niklas' suggestion is probably our
best compromise.  I still would have liked to show trailing zeros when the
number is rounded, but due to binary floating-point rounding error, supporting
that reliably would probably be very difficult (I've tried).

For instance, the moment you enter a value of 449.1 into a cell, that number
already becomes 449.100000000000002273737 internally, represented by
double-precision.  There is no way of knowing whether that number is as typed by
the user, or altered due to binary rounding error.  We could track the number of
decimals as typed, but carrying that extra information around while calculating
formulas would probably affect the calculation speed negatively.  I wouldn't
want that.

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