user: Question: How many districts have an area of 17.72 KM2?
Columns: ['English name', 'Original name', 'Area in km²', 'Population at 2010 Census', 'Number of settlements and villages']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['North Bogor', 'Kecamatan Bogor Utara', '17.72', 170320.0, 8.0]
SQL:

assistant: SELECT COUNT("English name") FROM "Table" WHERE "Area in km²" = '17.72';