Public archive of `calculator.koplugin`

[shuvashish76]

https://github.com/koreader/contrib/tree/main/calculator.koplugin

Looks like the plugin dev deleted their GitHub account. I've uploaded the public archive at SoftwareHeritage
They didn't provide any license file but since it's listed in this repo I assumed it to be same as KOR i.e. AGPL-3.0