Decimal separator in TTS messages

Instruction in English is “at roundabout, take exit X” (X = number).

In Polish community has the translation “zjedź z ronda X zjazdem”.

I can change it, if there is a better one, but without 1st, 2nd, …, etc.
Need to keep the simple English text with numbers, easier for TTS.

Something like “na rondzie, zjedź na zjazd X” ?