Trying to use the metric system

How to make text-davinci-003 use the metric system?
I’m trying to build a Q&A and tried giving it examples of questions with answers in metric, but it doesn’t seem to work. In the playground it did work, but using the same settings as API call doesn’t. I tried asking it to use metrics in the description before the questions and answers, but that messes up the answers by saying stuff about the “metric system” unnecessarily.

What settings are you using?