Greenland Primary School donated 352 storybooks to Hope Primary School, and donated 216 more science books than storybooks. If all the books were to be boxed, how many boxes would be packed in a box every 40 minutes?
绿地小学向希望小学捐赠了故事书352本，捐赠的科技书比故事书多216本，如果要把所有的书装箱，每40分装一箱，一共要装多少箱？
<gadget id="calculator">352 + 216 + 352</gadget>
<output>920</output>

<gadget id="calculator">920 / 40</gadget>
<output>23</output>

<result>23</result>