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.
(..) - Know where he lives? - Yeah. - You deliver mail to his house? - Yeah. From now on, any letter from school to his house comes directly here. Understand? Another letter from school goes to that kid's house... ...in the oven you will go, head first. That was it. No more letters from (..)1990 Goodfellas