I think the first calculator I used was one of those. It took me till college and programming before I really properly learned precedence because I never truste

I think the first calculator I used was one of those. It took me till college and programming before I really properly learned precedence because I never trusted any calculator I was using, and always used parentheses. This also kind of influences my programming, probably for the better - I would rather use parens and be clear than be ambiguous and trust that my interpreter and I agree on what has proper precedence.