7-3

7-3 can refer to the following:
 * World 7-3 from various games
 * Level 7-3 from Mario & Wario
 * Stage 7-3 from Donkey Kong for the Game Boy
 * Giddy Sky 7-3 from Super Princess Peach
 * Room 7-3 from Mario vs. Donkey Kong 2: March of the Minis
 * Chapter 7-3 from Super Paper Mario
 * Area 7-3 from Mario vs. Donkey Kong: Mini-Land Mayhem!