* He has done something with: This is the most common meaning, and it implies that the subject has used something to create or achieve something else. For example: "Il a fait de la farine un gâteau" (He has made a cake out of flour).
* He has made something into something else: Similar to the previous interpretation, but more focused on the transformation. For example: "Il a fait de son garage un atelier" (He has made his garage into a workshop).
* He has made something of himself: This interpretation refers to the person's accomplishments and how they've grown as a person. For example: "Il a fait de sa vie un succès" (He has made a success of his life).
It's important to look at the entire sentence to understand the specific meaning of "il a fait de."