If you choose to read 2 books of different subjects from 3 different Chinese books, 4 different mathematics books, and 6 different foreign language books, how many different ways are there in total?
如果从3本不同的语文书、4本不同的数学书、6本不同的外语书中选取2本不同学科的书阅读，那么，共有多少种不同的选法？
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">3 * 6</gadget>
<output>18</output>

<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<gadget id="calculator">12 + 18 + 24</gadget>
<output>54</output>

<result>54</result>