JRPN - Jovial Reverse Polish Notation Calculators

第１
JRPN - Jovial Reverse Polish Notation Calculators
https://jrpn.jovial.com/

第２　ubuntu 24-04 install
https://snapcraft.io/jrpn16
sudo snap install jrpn16

第３　他の電卓
https://snapcraft.io/jrpn15

第４　作動

以上