> Everyone uses a calculator, even to calculate tips at a restaurant, but kids still need to learn arithmetic without a calculator's aid first.

citation needed

I was rapped across the knuckles by a sadistic primary school teacher for failing to learn my times table fast enough. Everyone said I absolutely needed to learn this because I would not always have access to a calculator. Here I am, literally carrying a calculator with me every second of my life.

I've spent more time and money getting therapy for the shit my teachers did to me trying to teach me the times table than I've saved using it.