To round on the Casio FX-991DE X, follow these steps:

## Setting the rounding
- Press the `[SHIFT]` button and then the `[MODE]` button to enter the setup menu.
- Select the option `6` (FIX).
- Enter the number of decimal places you want to round to (e.g. `2` for two decimal places).

## Example
- Press `[SHIFT] + [MODE]`, then `6` (FIX), and finally `2` for rounding to two decimal places.

## Deactivating the rounding function
- To deactivate the rounding function and return to the standard display, press `[SHIFT] + [MODE]`, then `8` (Norm) and finally `1`.

These settings ensure that all calculations are rounded to the desired number of decimal places.

1000 separation?