Grasple has multiple check methods using the Computer Algebra System (CAS) which can be used within the editor to indicate when the answer of a student should be marked correct/incorrect. A full list of current options can be found in this article.
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This article covers the Has Precision Of check. There are two sections in this article:

If you want to provide feedback the precision of a given answer, this is the check you can use. This check verifies if the precision of a given unit expression is equal to the numeric value given on the right hand side.

This check extracts the precision from the unit expression given on the left-hand side. How this is done can be found in this section. It then compares this value to the precision given on the right-hand side.

Do you want to know more about this check, whether you should use it for your exercise or any of the other checks? Please let us know via the chat icon in the right bottom of the screen!