His earnings are 'directly proportional' to the number of units he sells.
The second game followed 'directly' [='immediately'] after the first.
Their house is 'directly' ahead. = It's 'directly' in front of us.
(..) - Make that the first thing on your list. - Understood. Mickey, tomorrow, get some guys and go to Luca's apartment. Maybe we shouldn't get Mike mixed up in this too directly. Hanging around the house on the phone would be a big help. Try Luca again. - What's this? - A Sicilian message. (..)1972 The Godfather