Xiaoliang is 9 years old this year. His age was equivalent to (1/4) of his father's age last year. How much older is his father than Xiaoliang?
小亮今年9岁，去年他的年龄相当于爸爸的年龄的(1/4)，爸爸比小亮大多少岁？
<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">8 / (1/4)</gadget>
<output>32</output>

<gadget id="calculator">32 - 8</gadget>
<output>24</output>

<result>24</result>