This is what a ‘calculator’ looked like when I was a kid. Only AFTER I had finished grade school did they come out with pocket calculators.
Back in the 80s, I attended an employee orientation session at Boeing. An engineer-instructor told the story of how back in the 1950s he had entered a room full of engineers working hand-crank calculators for a whole month to produce an airflow simulation graph. Then in the 80s, he entered a room and a gal was sitting at a supercomputer and pressed a key and the screen instantly generated the same kind of graph in multiple colors. He glared at her and she laughed.