CREATE TABLE table_203_707 (id DECIMAL, "rank" DECIMAL, "npc" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

what was the difference in gold medals between russia and china ?
SELECT (SELECT "gold" FROM table_203_707 WHERE "npc" = 'china') - (SELECT "gold" FROM table_203_707 WHERE "npc" = 'russia')
SELECT (SELECT "gold" FROM "table_203_707" WHERE "npc" = 'china') - (SELECT "gold" FROM "table_203_707" WHERE "npc" = 'russia')