What's the total diameter when longitude is 357.8e later than 1985?
CREATE TABLE "dorsa" (
  "name" text,
  "latitude" text,
  "longitude" text,
  "diameter_km" real,
  "year_named" real
);
SELECT COUNT("diameter_km") FROM "dorsa" WHERE "longitude"='357.8e' AND "year_named">1985;