What's the number of the episode seen by 2.24 million people in the US?
CREATE TABLE table_24558 (
    "No." real,
    "#" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "U.S. air date" text,
    "Production code" text,
    "U.S. viewers (million)" text
)
SELECT "#" FROM table_24558 WHERE "U.S. viewers (million)" = '2.24'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What's the number of the episode seen by 2.24 million people in the US? ### Input: CREATE TABLE table_24558 (
    "No." real,
    "#" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "U.S. air date" text,
    "Production code" text,
    "U.S. viewers (million)" text
) ### Response: SELECT "#" FROM table_24558 WHERE "U.S. viewers (million)" = '2.24'