@argv_minus_one @tykling I'm not talking about two long multidigit numbers like Ramanujan or anything. Smaller divisions are just reversing times table, slightly longer divisions visualise writing the steps on a piece of paper. Converting to binary first would be a step too far (although thats just division too..)

@patterfloof @tykling That is something I notice, that a quick estimate in your head is often enough, and if it isn't its still enough to check you didn't do anything silly with the calculator...,

@tykling mental arithmetic is another. Coming from a precalculator generation it was once second nature. Now I still remember (with a slight delay) the times table, but ask me to do division in my head and I almost have to start from first principles. But I guess later generations never had this ability? #vibecoding