Xiaohua is 8 years old this year, and his mother is 34 years old. After many years, his mother will be three times as old as Xiaohua.
小华今年8岁，妈妈34岁，再过多少年，妈妈的年龄是小华的3倍．
<gadget id="calculator">34 - 8</gadget>
<output>26</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">26 / 2</gadget>
<output>13</output>

<gadget id="calculator">13 - 8</gadget>
<output>5</output>

<result>5</result>