Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_30 (overall INTEGER, name VARCHAR, pick__number VARCHAR, round VARCHAR)

### Question ###
Which Overall is the average one that has a Pick # larger than 7, and a Round larger than 4, and a Name of glen howe?

### Accurate SQL ###

SELECT AVG(overall) FROM table_name_30 WHERE pick__number > 7 AND round > 4 AND name = "glen howe"