How To Calculate The Expression Number ?

But how is the number of expressions calculated?
In numerology, each letter of the alphabet corresponds to a digit between 1 and 9. Learning numerology involves knowing the conversion that can be done very simply with the following table:

Par exemple: Les nombres principaux d'une personne nommée
"Marie-Louise Dupont" will be next:

It's as simple as counting to 9, in short...