How many laps were completed in the time of +7.213 with a grid number larger than 7?
CREATE TABLE "250cc_classification" (
  "rider" text,
  "manufacturer" text,
  "laps" real,
  "time_retired" text,
  "grid" real
);
SELECT COUNT("laps") FROM "250cc_classification" WHERE "time_retired"='+7.213' AND "grid">7;