Teacher Wang and Teacher Li buy the same books. Mr. Wang bought 8 books for 256 yuan, and Mr. Li spent 192 yuan. How many more books did Mr. Wang buy than Mr. Li?
王老师和李老师买同样的图书．王老师花了256元买到8本，李老师花了192元，王老师比李老师多买了多少本图书？
<gadget id="calculator">256 / 8</gadget>
<output>32</output>

<gadget id="calculator">192 / 32</gadget>
<output>6</output>

<gadget id="calculator">8 - 6</gadget>
<output>2</output>

<result>2</result>