Wang Kang bought 4 diaries for 48 yuan. He also wants to buy 8 diaries for his good friends. How much money does he need to prepare?
王康同学买4本日记本用了48元，他还想买8本送给他的好朋友们，需要准备多少钱？
<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<gadget id="calculator">4 + 8</gadget>
<output>12</output>

<gadget id="calculator">12 * 12</gadget>
<output>144</output>

<result>144</result>