Xiaohong is 14 years old this year, and her father is 41 years old. A few years ago, Dad was four times Xiaohong's age?
今年小红14岁，爸爸41岁．几年前爸爸的年龄是小红的四倍？
<gadget id="calculator">41 - 14</gadget>
<output>27</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">27 / 3</gadget>
<output>9</output>

<gadget id="calculator">14 - 9</gadget>
<output>5</output>

<result>5</result>