Soulver includes a number of different formatting options for answers.
You can set your preferred default by going Edit > Tweak Calculator > Default Formatting or customize an individual line's formatting through the contextual menu (control-click on the answer), or with the Format menu.
If you manually set formatting options on a line, it will no longer "sync" with the default formatting options. You can reset a line's formatting to match & sync with the defaults by going Forma > Reset to Defaults
Decimal Places (dp)
Change the number of decimal places shown in an answer using the Format > Precision menu, or with the contextual menu:
Rounding formatting is only cosmetic. The maximum accuracy unrounded answer will be used in subtotals and line references.
Soulver uses SI Notation to save you counting 0s in the answer. For example, 1,700,000 is expressed as 1.7M.
You can disable this feature underFormat > Notation for Large & Small numbers or for all lines in the Tweak Calculator sheet.
With currency rounding on (the default), currencies will be auto-rounded to their preferred number of decimal places. For most currencies this is 2 dp, though there are currencies like Japanese Yen that round to 0 dp.
Unlike regular lines, the rounded answer of currencies is used in subtotals and line references. This matches how money works in the real world.
You should disable currency rounding if you need sub-cent accuracy.
An exception to this is when using variables, which always use unrounded answers, even of currency lines.
You may want to manually round a currencies in a variable as shown below, or use a line reference instead.