CREATE TABLE table_name_72 (long NUMBER, gain VARCHAR2, loss VARCHAR2)

What is the average long that has 1581 as a gain, with a loss less than 308?
SELECT AVG(long) FROM table_name_72 WHERE gain = 1581 AND loss < 308
SELECT AVG("long") FROM "table_name_72" WHERE "gain" = 1581 AND "loss" < 308