CREATE TABLE table_16435 ("English name" TEXT, "Original name" TEXT, "Area in km\\u00b2" TEXT, "Population at 2010 Census" FLOAT, "Number of settlements and villages" FLOAT)

How many districts have an area of 17.72 KM2?
SELECT COUNT("English name") FROM table_16435 WHERE "Area in km\u00b2" = '17.72'
SELECT COUNT("English name") FROM "table_16435" WHERE "Area in km\u00b2" = '17.72'