CREATE TABLE table_24856090_1 (average INT, hk_viewers VARCHAR)

What is the largest average for the episode with 1.97 million Hong Kong viewers?
SELECT MAX(average) FROM table_24856090_1 WHERE hk_viewers = "1.97 million"
SELECT MAX("average") FROM "table_24856090_1" WHERE "1.97 million" = "hk_viewers"