How do I add e in material Vector2?

I am following a tutorial for a procedural shader and they use a node I can’t find and don’t know how to find it

269477-capture.png

How do you get the e? I have tried straight adding in it in the definition, but it doesn’t work

It’s automatic, it’s just a very large number:

269501-capture.png

Look up e-notation [here][2] for more info.

edit: to answer directly, I don’t think you can. Nodes are basic calculators so 1+5 becomes 6 - it’s a neat tip, actually.