Create ML - Xcode - Is there a decimal limit for Tabular data?

I'm using Xcode's integrated Create ML tool/interface to create a Tabular Classifier Model. I need to use data with a lot of decimals - like this: 34.07912695791137


After training the model, the Testing data values/output seems to limit the amount of decimal points to 34.0791


I've tried removing the decimal points through multiplication - ie using 3,407,912,695,791,137 instead of 34.07912695791137. Yet again, the output values of any testing data I feed the model is: 3,407,912,000,000,000.


This suggests there is both a decimal limit to the numeric data used in Create ML - however, I can't find it in the documentation. Am I missing something?


Thanks!

David