Mr. Wang bought 15 ballpoint pens and 15 notebooks, and paid a total of 60 yuan. Knowing that each ballpoint pen is 1.8 yuan, how much is each notebook?
王老师买了15支圆珠笔和15本笔记本，共付60元，已知圆珠笔每支1.8元，笔记本每本多少元？
<gadget id="calculator">1.8 * 15</gadget>
<output>27</output>

<gadget id="calculator">60 - 27</gadget>
<output>33</output>

<gadget id="calculator">33 / 15</gadget>
<output>11/5 = around 2.2</output>

<result>11/5 = around 2.2</result>