CREATE TABLE table_24583 ("No." FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

what is the total number o production code where us viewers is 2.76?
SELECT COUNT("Production code") FROM table_24583 WHERE "U.S. viewers (million)" = '2.76'
SELECT COUNT("Production code") FROM "table_24583" WHERE "U.S. viewers (million)" = '2.76'