>Why is the result of
>
>round(3.9 * 55.15,2) = 215.09 different from
>round(3.900000000 * 55.15,2) = 215.08 ?

Janet,

I suspect that this has something to do with the internal precision.

the result of 3.900000000 * 55.15 is a bit less than 215.085

? 3.900000000 * 55.15  && 215.0850000000000

? (3.9 * 55.15-215.085)*10000 && -0.00000000028

The round() works ok.