Xiaohong is 12 years old this year, and her father is three times her age. How much older is her father?
小红今年12岁，爸爸的年龄是她的3倍，爸爸比她大多少岁？
<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">36 - 12</gadget>
<output>24</output>

<result>24</result>