I'd rather use my mind doing those basic multiplications! That apple feature is useless imo might be useful for small kids ngl. But in real world scenario I bet it would be hard to calculate huge numbers as the space will run out and I believe no one will give their time writing small numbers haha..
Btw..Motorola laughing on corner😂 Motorola has this feature before iphone introduced it. Means, iphone=copycat Iphone even copied android, 1OS 18 < android Customization=android Iphone=copied it