Body: Mary is baking a cake. The recipe calls for 6 cups of sugar and 9 cups of flour. She already put in 2 cups of flour.
Question: How many more cups of flour than cups of sugar does she need to add now?
question_concat: Mary is baking a cake. The recipe calls for 6 cups of sugar and 9 cups of flour. She already put in 2 cups of flour. How many more cups of flour than cups of sugar does she need to add now?