I'm not quite sure what you mean. You were given the conversion factor above (though it's approximate, as this varies somewhat between extract types, so you have to look up the exact numbers if you want to be precise).
The conversion factor assumes that you've chosen a fixed wort volume into which you were going to dissolve some weight of DME. To produce the same volume of wort with the same SG, you multiply by the conversion factor (~1.2) to get the weight of LME you need. (Note that you will be adding different amounts of water to get equal total wort volumes.)
Does that help?