We are not inserting the comma. In fact, I avoid using the comma as a separator because it causes confusion for Europeans (and South Americans if IIRC).
Evidently the software has been modified for use in your region, but not others. It probably goes back to its origins before the NYT buyout.
BIPM (IIRC the source correctly) recommends the use of a space rather than a comma (used in North America) or a period (used in Europe) to avoid confusion. That may be the reason it was developed that way in the software.
After a long time the voltage across the (ideal) inductor goes to zero. The current through the inductor is steady (##\frac{di}{dt}=0##), but the voltage ##V## across the battery is not zero, the current is ##\frac{V}{R}##.
I know. That's my point. You need to learn how to do that. Otherwise you have to take it on someone else's authority and you never learn. You won't achieve success that way.
One of the skills needed for success in the course is the ability to judge the validity of your answers for yourself. Focus on sense-making rather than answer-making.