How many tot officers were there on the date when the number of tot enlisted was 329640?
CREATE TABLE "growth_personnel" (
  "date" text,
  "total_usaaf" real,
  "tot_officers" real,
  "tot_enlisted" real,
  "num_overseas" real,
  "officers_o_s" real,
  "enlisted_o_s" real
);
SELECT "tot_officers" FROM "growth_personnel" WHERE "tot_enlisted"=329640;