At least 2 digits (with more precision as necessary?)

[timc13]

Is there a way to show at least 2 digit precision, but more if necessary?

The use case is money. In most cases I need just 2 decimal points. In some financial scenarios, I need more precision (fraction of cents).
For example:

• 32 should show as $32.00
• 32.004 should show as $32.004
• 32.12 should show as $32.12
• 32.1234567 should show as $32.123456 (given a 6 digit decimal precision)