In the activity of donating books to "Hope Primary School", the school donated a total of 840 books. 15 of these books should be bundled into a bundle, and 8 bundles should be packed into a box. How many boxes can it hold in total?
学校在向"希望小学"捐赠图书的活动中，共捐赠840本图书．要把这些图书15本捆一捆，8捆装一箱．一共能装多少箱？
<gadget id="calculator">840 / 15 / 8</gadget>
<output>7</output>

<result>7</result>