Calculator is missing or uninstalled on my Mate 10. How to get it back?

As far as I know you can only disable calculator, but you can’t uninstall it on Mate 10. If you’ve root access to your phone then it’s a different story. Follow the steps here to check if you’ve accidentally disabled it:

1. From the device’s Settings, tap Apps & notifications > Apps.
2. Check if you can find calculator here and whether it’s disabled.
3. If it’s disabled, you can enable it here.