Using the latest version of kcalc code and overwriting the changes then
the problem was solved. A patch file for 19.12.3 to 19.12.4 is provided
** Patch added: "19.12.3-19.12.4.patch"
https://bugs.launchpad.net/ubuntu/+source/kcalc/+bug/1917289/+attachment/5476272/+files/19.12.3-19.12.4.patch
Public bug reported:
kcalc 4:19.12.3-0ubuntu1
Description:Ubuntu 20.04.2 LTS
Release:20.04
kcalc:
Installed: 4:19.12.3-0ubuntu1
Candidate: 4:19.12.3-0ubuntu1
Version table:
*** 4:19.12.3-0ubuntu1 500
500 http://us.archive.ubuntu.com/ubuntu focal/universe amd64 Packages