How to divide by zero

It is not a philosophical subjet but the real solution of this division.

How something so simple not be seen before ?

I don't understand.

But you just need to know Galois fields and the "Théorie des ensembles". After read well what I go to say and you go to discover this just looking well.

You need to have eyes to see.
So simple and so marvelous solution when you start to understand