what is the number of times a hard surface was used ?
CREATE TABLE table_204_724 (
    id number,
    "outcome" text,
    "no." number,
    "date" text,
    "tournament" text,
    "surface" text,
    "partner" text,
    "opponents in the final" text,
    "score in the final" text
)
SELECT COUNT(*) FROM table_204_724 WHERE "surface" = 'hard'
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 is the number of times a hard surface was used ? ### Input: CREATE TABLE table_204_724 (
    id number,
    "outcome" text,
    "no." number,
    "date" text,
    "tournament" text,
    "surface" text,
    "partner" text,
    "opponents in the final" text,
    "score in the final" text
) ### Response: SELECT COUNT(*) FROM table_204_724 WHERE "surface" = 'hard'