user: Question: What are the average start(s) when he had $1,663,868?
Columns: ['Year', 'Starts', 'Wins', 'Top 10', 'Avg. Start', 'Avg. Finish', 'Winnings', 'Position', 'Team(s)']
Types: ['real', 'real', 'real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [2001.0, 30.0, 0.0, 1.0, '28.7', '27.7', '$1,724,692', '37th', '#01 Chip Ganassi Racing']
SQL:

assistant: SELECT "Avg. Start" FROM "Table" WHERE "Winnings" = '$1,663,868';