The sugar factory has produced 864 pieces of chocolate, every 9 pieces are packed into a box, and every 8 boxes are put into a box, how many boxes can be packed in total.
制糖厂生产了864块巧克力，每9块装一盒，每8盒装一箱，一共能装多少箱．
<gadget id="calculator">8 * 9</gadget>
<output>72</output>

<gadget id="calculator">864 / 72</gadget>
<output>12</output>

<result>12</result>