What is the flange width (mm) for cross section area (cm 2) 16.4?
CREATE TABLE "indian_standard_beams_ismb" (
  "type" text,
  "beam_height_mm" real,
  "flange_width_mm" real,
  "web_thickness_mm" text,
  "flange_thickness_mm" text,
  "weight_kg_m" text,
  "cross_section_area_cm_2" text,
  "moment_of_inertia_in_torsion_j_cm_4" text
);
SELECT COUNT("flange_width_mm") FROM "indian_standard_beams_ismb" WHERE "cross_section_area_cm_2"='16.4';