How many total episodes aired over all seasons with 7.79 million viewers?
CREATE TABLE "seasonal_ratings_broadcast_history" (
  "season" real,
  "network" text,
  "time_slot" text,
  "season_premiere" text,
  "season_finale" text,
  "episode_count" real,
  "tv_season" text,
  "season_rank" text,
  "viewers_in_millions" real
);
SELECT COUNT("episode_count") FROM "seasonal_ratings_broadcast_history" WHERE "viewers_in_millions"=7.79;