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Código fuente de Calculadora :
https://drive.google.com/file/d/1upD17wn7h5hAxSB-rx-VYuOMwCZ6d1c2/view?usp=sharing
(origen: https://data-flair.training/blogs/build-simple-calculator-app-android-studio/)
Emulador de Android BLUESTACKS:
https://drive.google.com/file/d/10lJEv_bizCBOl67Iht9H5DL8V47h3qQM/view?usp=sharing
Android Studio:
https://drive.google.com/file/d/10a5Jm1TGBuNX-QbGszls64ZrEgz7kYCm/view?usp=drivesdk
Netbeans:
https://drive.google.com/file/d/11lbA98S12zGLVlhGFQ6fpi_ua6z8tAQX/view?usp=sharing
Eclipse (sept 2021):
https://drive.google.com/file/d/19gqjZ3aLpJM-y7lgqt2E6EhTED5UwioA/view?usp=sharing