What is the total prominence in m of kangchenjunga west (yalung kang) peak, which has a height in m greater than 7,903 and a height in ft less than 27,904?
CREATE TABLE "geography" (
  "name_of_peak" text,
  "height_m" real,
  "height_ft" real,
  "prominence_m" real,
  "prominence_ft" real,
  "nearest_higher_neighbor" text
);
SELECT COUNT("prominence_m") FROM "geography" WHERE "height_m">'7,903' AND "name_of_peak"='kangchenjunga west (yalung kang)' AND "height_ft"<'27,904';