CREATE TABLE table_35420 ("Name" TEXT, "Innhabitants" FLOAT, "Area" FLOAT, "Mayor" TEXT, "Party" TEXT, "Municipal code" FLOAT, "Language form" TEXT)

What's the area of ask y, with a Municipal code less than 1247?
SELECT SUM("Area") FROM table_35420 WHERE "Name" = 'askøy' AND "Municipal code" < '1247'
SELECT SUM("Area") FROM "table_35420" WHERE "Municipal code" < '1247' AND "Name" = 'askøy'