That looks normal. The internal application storage contains the apk packages for the apps you installed, plus their unpacked instaled size plus any data they cache. It also includes the virtual machine data generated when the apps are installed and which is required to run them.
I booted my A43 to the developer edition running Chrulri's root in debug more and then looked at the internal storage from the adb shell:
Internal storage seems to be
/dev/block/mmcblk0p4 269.9M 215.4M 51.7M 81% /data
The apps I installed come to about 66 MB of stored .apk packages in /data/app, and then about the same again for their unpacked size in /data/data, and then about the same size again in /data/dalvik-cache which is the cache area for the Dalvik (java-like) virtual machine which runs Android apps. There are a few more directories, some empty and some with smaller amounts of data and it does correlate to the Settings>Storage>System storage figure on my A43 of 51.68 MB remaining. I'm sure your A43 would look much the same.
If you're feeling brave/curious/desperate/confident you can increase the space available for installed apps http://forum.archosfans.com/viewtopic.php?t=54637
but be warned that running Chrulri's root r+w has a major performance penalty. Another alternative is to run Urukdroid but that has some problems as well such as no hardware accelerated video playback so if you watch videos your battery life is really lousy (I write from experience).