Dad is 38 years old this year, 2 years older than Xiaowei's 4 times age. How old is Xiaowei?
爸爸今年38岁，比小蔚年龄的4倍还大2岁．小蔚今年几岁？
<gadget id="calculator">38 - 2</gadget>
<output>36</output>

<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<result>9</result>