There are 6 rows of apple trees in the orchard, with 12 trees in each row. A total of 648 baskets of apples have been harvested this year. How many baskets of apples does each apple tree harvest on average?
果园里一共有6行苹果树，每行12棵，今年共收了648筐苹果，平均每棵苹果树收苹果多少筐？
<gadget id="calculator">648 / 6</gadget>
<output>108</output>

<gadget id="calculator">108 / 12</gadget>
<output>9</output>

<result>9</result>