Grandpa is 68 years old this year, half of grandpa's age plus 8 is three times Xiaoya's age. How old is Xiaoya?
爷爷今年68岁，爷爷年龄的一半加上8，就是小亚年龄的3倍．小亚今年几岁？
<gadget id="calculator">68 / 2</gadget>
<output>34</output>

<gadget id="calculator">34 + 8</gadget>
<output>42</output>

<gadget id="calculator">42 / 3</gadget>
<output>14</output>

<result>14</result>