Rounding can be controlled. Acrobat forms and one is able to separate the field value from the field's displayed value. One can see this by creating the calculation in more than one field, and then setting the format of one of the fields to "None" and observe the differences. One could even add a third field and use the "util.printf" method to force the value of a field to a rounded value. This approach does not use the default and simple calculation methods but requires the use of custom calculations and custom formatting to control the actual field value and the displayed values.