Is there a way to refrain the system from automatically rounding?

Summary:

Is there a way to refrain the system from automatically rounding? Is there any configuration behind that? If not, what configurations can be completed to ensure that Req and PO amounts are the same (unless manually changed).

Content (required):

Reqs and POs are not matching because of Oracle's automatic rounding.

Version (include the version you are using, if applicable)

Code Snippet (add any code snippets that support your topic, if applicable):