There are 150 story books and 93 technology books. Put it on 3 bookshelves on average, how many books are placed on each shelf?
有150本故事书，93本科技书．平均放在3个书架上，每个书架放多少本？
<gadget id="calculator">150 + 93</gadget>
<output>243</output>

<gadget id="calculator">243 / 3</gadget>
<output>81</output>

<result>81</result>