Element inspector: Formula in Width/Height & Position

In most design tools (Adobe PS, Adobe AI, Figma, …), users are able to make a quick calculation within the Inspector’s input fields.

My Element is 203px wide, but I want to make it 16px wider.
I want to be able to type 203+16 instead of 219.

Reference screenshot from Figma
Screenshot 2021-02-04 at 10.44.39