user: ### NOW ANSWER:
Question: What Band number has a Power (W) of 400 or less?
Columns: ['Band', 'Frequency (MHz)', 'Wavelength', 'Type', 'Power (W)']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [7.0, '3.520–3.540', '80 m', 'HF', 400.0]
SQL:

assistant: SELECT SUM("Band") FROM "Table" WHERE "Power (W)" < 400.0;