user: Question: What is the 4wi when the economy is 7.82?
Columns: ['Player', 'Team', 'Matches', 'Overs', 'Wickets', 'Average', 'Economy', 'BBI', '4wi', '5wi']
Types: ['text', 'text', 'real', 'text', 'real', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Virender Sehwag Category:Articles with hCards', 'Leicestershire', 6.0, '14.0', 7.0, '10.00', '5.00', '3/14', 0.0, 0.0]
SQL:

assistant: SELECT "4wi" FROM "Table" WHERE "Economy" = '7.82';