Adding a calculated field in a table

Version: Grafana 8

I try to calculate the price next to it in a table for my respective daily electricity consumption.
The calculation is very simple and the data value is also available. However, I do not know how I can map this in Grafana.
Can someone tell me how this works?

Attached is a picture, there exemplary values written behind as I imagine it.

Thanks for the help.

Think AFAIK you cannot use the computed values by Grafana , you can calculate that in your query and use it.
IMHO easier if you have a backend API /webservice which does these calculatons.

Samant is correct. If you tell us what datasource you are using, we may be able to help you with the query.