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 Scientists ( SSN int, Name Char(30) )
TABLE: CREATE TABLE AssignedTo ( Scientist int, Project char(4) )
TABLE: CREATE TABLE Projects ( Code Char(4), Name Char(50), Hours int )

### Question ###
Give me a histogram for what are the names of projects that require more than 300 hours, and how many scientists are assigned to each?

### Accurate SQL ###

SELECT Name, COUNT(*) FROM Projects AS T1 JOIN AssignedTo AS T2 ON T1.Code = T2.Project WHERE T1.Hours > 300 GROUP BY T1.Name