I use whatever scientific caluclator it was that I bought for highschool back in the 90s It still works And does more than I've ever needed it to Yes, I also

I use whatever scientific caluclator it was that I bought for highschool back in the 90s It still works And does more than I've ever needed it to Yes, I also use Excel or Numbers or my phone's calculator or the Calculator app on my desktop ... but there are times when it's just way simpler to use a dedicated device