<2-way edittext updates for specific use-case calc...

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[user]

2-way edittext updates for specific use-case calculator
I am working on a personal project as a beginner learning kotlin for android. Im trying to make a calculator and have values update automatically in edittext's.
The question I have is lets say I have 5 edittexts (length, width, area, cost/sqft, and total cost). I would like the whole calculator to update if any of the edittext's change. (ie if width changes, the area updates. similarly, if the area is manually entered, width or length automatically change to make the whole form "correct".) I...