autopopulate text from one set of cells to another without cutting off text

I am trying to auto-populate text in cells in area A, based on data I enter into other cells in area B. I want the area A cells to be for display only, as all editing will be done in area B. The problem I need help with is: how do I do this such that the text I write does not get cut off if is longer than the column width? See the attached document for a clear example and description of what I am trying to do...

Thank you VERY MUCH in advance. This is for an important project in grad school.

Jessica