I know it’s bothering, but everyone need help and my curiosity maybe can help others
@Kinma I will try. But do you think Soroban’s multiplication is better than the traditional (cross product) one?
My goal is being able to do the faster multiplications, surpassing myself every day
Personally I would go for the cross multiplication.
Try both and see what suits you best.
In this case btw I would use neither.
Think about it:
9307 × 7992 = 9307 × 8000 - 9307 X 8.
And; for a mental calculator, 9307 X 8000 is the same calculation as 9307 X 8.
So do 9307 X 8, add 3 zero’s and subtract. Done.