CREATE TABLE table_157 ("Team" CLOB, "Stadium" CLOB, "Capacity" FLOAT, "Lowest" FLOAT, "Highest" FLOAT, "Average" FLOAT)

Which stadiums have an average attendance of 13840?
SELECT "Stadium" FROM table_157 WHERE "Average" = '13840'
SELECT "Stadium" FROM "table_157" WHERE "Average" = '13840'