user: Question: What is the area (square km) where the arrondissement is Millau?
Columns: ['Dep.', 'Chief town', 'Arrondissement', 'Population (1999)', 'Area (Square km)', 'Pop density', 'Cantons', 'Communes']
Types: ['text', 'text', 'text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['01', 'Belley', 'Belley', '79,656', 1307.0, 61.0, 9.0, 107.0]
SQL:

assistant: SELECT "Area (Square km)" FROM "Table" WHERE "Arrondissement" = 'Millau';