I’m struggling doing multiplications, additions and the likes of a number bigger than 4 digits.
For example, I want to do 45741 x 92443, but I lose the track. I think that the best way is transform the numbers in a shape-system but even then I think it won’t be easy for me.
I can resolve it in Memoriad [the multiplications] but in mental math, without writing it down, I can only do 4 x 4.
Any tip, suggestion or help to fix it would be very apprecied.