Xiao Ming has several books and CDs. The number of CDs is 4 less than 3 times the number of books, and 8 more than twice the number of books. So how many CDs does Xiao Ming have?
小明有书和光碟若干，光碟的数量比书的数量的3倍少4盘，比书的2倍多8盘，那么小明有光碟多少盘．
<gadget id="calculator">4 + 8</gadget>
<output>12</output>

<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<gadget id="calculator">12 / 1</gadget>
<output>12</output>

<gadget id="calculator">3 * 12</gadget>
<output>36</output>

<gadget id="calculator">36 - 4</gadget>
<output>32</output>

<result>32</result>