Hi Angelica,
there is an online calculator available, similar to the windows build-in calculator.
If you do the exam online, you are not allowed to use paper&pencil; instead of that, you need to use the also build-in whiteboard.
If you do the exam in a test center, it depends I would say. Some will hand out you some pieces of paper and a pencil; others will
give you a tablet or something similar.
If you want to be 100% sure you need to contact them directly, I guess.
Regards,
Markus