Calculation Field

D8 port of the Math Field module (no activity for 2 years, no recognizable effort to port the module to D8)

First step will be to port the module as it is for those who are familiar with its functionality.
But we are planning several additions:

• support for multi value fields
• custom defined functions like sum() for multi value fields
• support for paragraphs and field colletions
• a possibility for editors to use math expressions, too. The original module only gave administrators the possibility to use math expressions in the field settings form, but we want editors to also have this possibility in the node edit form.