Dad is twice as old as Li Qiang, and grandpa is three times as old as Li Qiang. Dad is 48 years old this year. How old is grandpa?
爸爸的年龄是李强的2倍，而爷爷的年龄是李强的3倍，今年爸爸48岁，爷爷今年几岁？
<gadget id="calculator">48 / 2</gadget>
<output>24</output>

<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<result>72</result>