Name the total number of previous br number for number 21
CREATE TABLE table_2079664_3 (previous_br_no VARCHAR, number VARCHAR)
SELECT COUNT(previous_br_no) FROM table_2079664_3 WHERE number = "21"
### Context: CREATE TABLE table_2079664_3 (previous_br_no VARCHAR, number VARCHAR) ### Question: Name the total number of previous br number for number 21 ### Answer: SELECT COUNT(previous_br_no) FROM table_2079664_3 WHERE number = "21"