How many different municipal mayors were there in the municipality with an area of 42.66 km2?
CREATE TABLE table_216776_2 (
    municipal_mayor VARCHAR,
    area__km²_ VARCHAR
)
SELECT COUNT(municipal_mayor) FROM table_216776_2 WHERE area__km²_ = "42.66"
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: How many different municipal mayors were there in the municipality with an area of 42.66 km2? ### Input: CREATE TABLE table_216776_2 (
    municipal_mayor VARCHAR,
    area__km²_ VARCHAR
) ### Response: SELECT COUNT(municipal_mayor) FROM table_216776_2 WHERE area__km²_ = "42.66"