What's the area of askøy, with a Municipal code less than 1247?
CREATE TABLE "municipalities_of_midhordland" (
  "name" text,
  "innhabitants" real,
  "area" real,
  "mayor" text,
  "party" text,
  "municipal_code" real,
  "language_form" text
);
SELECT SUM("area") FROM "municipalities_of_midhordland" WHERE "name"='askøy' AND "municipal_code"<1247;