My mother is 28 years older than Xiaohong, and my mother's age this year is three times that of Xiaohong. How old is Xiaohong this year?
妈妈比小红大28岁，妈妈今年的年龄是小红的3倍，小红今年多少岁．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">28 / 2</gadget>
<output>14</output>

<result>14</result>