Created attachment 171233 [details]
arithmometer

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SUMMARY
Result of the last calculation don't automatically used in the next operation.
For FS my $5 20 yo casio can do that. A child toy calculator with pink unicorn and glitter all over it can do that. 100 yo mechanical arithmometer can do that. Even flipping abacus can remember the last result. But not modern piece of software with 16GB of ram and billions of transistors to it's disposal .


0. open kcalc
1. Type "2 + 2"
2. hit Return
3. see "4"
4. type "*4"+Return
5. expect "16"
6. see "Input error"
7. wright here
8. uninstall