7-4

7-4 can refer to the following:
 * World 7-4 from various games
 * Level 7-4 from Mario & Wario
 * Stage 7-4 from Donkey Kong for the Game Boy
 * Giddy Sky 7-4 from Super Princess Peach
 * Room 7-4 from Mario vs. Donkey Kong 2: March of the Minis
 * Chapter 7-4 from Super Paper Mario
 * Area 7-4 from Mario vs. Donkey Kong: Mini-Land Mayhem!