I see that as a bigger issue of default applications not being set correctly (and installing an alternative should hopefully fix that).
Search should also mitigate this (application search, package installer). kalc is not useful for search (kcalc is fine in that way), but the second obvious search term would be searching ulat (e/or) which would work for qalculate, and when descriptions are part of search calc actually does result in qalculate popping up.
For menus qalculate is in education and science section (because it can do a lot more than basic math), which might make it easier to find (on my system, both of those menus have that as the only option) or harder if you expect it to be in accessories like everything else standard.
I see that as a bigger issue of default applications not being set correctly (and installing an alternative should hopefully fix that).
Search should also mitigate this (application search, package installer). kalc is not useful for search (kcalc is fine in that way), but the second obvious search term would be searching ulat (e/or) which would work for qalculate, and when descriptions are part of search calc actually does result in qalculate popping up.
For menus qalculate is in education and science section (because it can do a lot more than basic math), which might make it easier to find (on my system, both of those menus have that as the only option) or harder if you expect it to be in accessories like everything else standard.