What is the Basin Area mi 2 when the Basin Area km 2 is larger than 2,261,763 and the Basin is Pearl River?
CREATE TABLE "basins" (
  "basin" text,
  "continent" text,
  "drains_to" text,
  "basin_area_km_2" real,
  "basin_area_mi_2" text
);
SELECT "basin_area_mi_2" FROM "basins" WHERE "basin_area_km_2">'2,261,763' AND "basin"='pearl river';