I have always had issues with conversions, and I have a test coming up tonight in Chem and I'm trying to get them down once and for all. Most of them I am understanding, but these few have me hung up? They have to be solved using dimensional analysis.

1) 342pm^2 to dm^2

2) 3.0qt to mL

3) 8.4ft^2 to cm^2

I think maybe the squaring is confusing me. I'm not exactly sure what to do with the conversions? I know, in say number 3, that if it weren't squared it'd be 8.4ft(12in/ft)(2.54cm/1in), but what exactly does squaring it do?

Any help is greatly appreciated!