Hi mo3748,
You may not get many replies since you've tagged onto an old post from November 2019 and many members may not be watching this post anymore.
That being said, You could attempt to root the stem of your
Chinese Evergreen (Aglaonema 'Pink Dalmatian') in water but there's always a chance that it may rot. You have such a substantive stem there, you could also pot it up in a small pot of it's own. I'd recommend using a very small plastic pot with drainage holes and a potting soil to which I'd add additional perlite. Place some potting mix into the pot and stick the stem in, firmly tamping additional soil around the base to secure it in place but be sure not to plant it any deeper than the dark part of what's remaining of the main stem. Keep the cutting in a well lit location and be extremely careful not to over water; the soil should be kept just
barely, barely moist. They can sometimes be slow to produce roots, especially at this time of year when plants are normally in resting mode so it may take awhile but eventually it should produce roots.