CREATE TABLE table_21726793_1 (production_code VARCHAR, us_viewers__million_ VARCHAR)

what is the total number o production code where us viewers is 2.76?
SELECT COUNT(production_code) FROM table_21726793_1 WHERE us_viewers__million_ = "2.76"
SELECT COUNT("production_code") FROM "table_21726793_1" WHERE "2.76" = "us_viewers__million_"