user: Question: Can you tell me the total number of Zone than has the Station users 2007-08 larger than 243800, and the Year opened of 1855?
Columns: ['Station', 'Year opened', 'Metropolitan borough [c ]', 'Zone', 'Station users 2006–07', 'Station users 2007–08']
Types: ['text', 'text', 'text', 'real', 'real', 'real']
Sample row: ['Acocks Green', '1852', 'Birmingham', 3.0, 160100.0, 161400.0]
SQL:

assistant: SELECT COUNT("Zone") FROM "Table" WHERE "Station users 2007–08" > 243800.0 AND "Year opened" = '1855';