The age difference between the two brothers is 6 years, and the age of the brother 5 years later is three times that of the brother 3 years ago. Q: How old is my brother?
兄弟二人的年龄相差6岁，兄5年后的年龄是弟3年前的3倍．问：哥哥今年多少岁．
<gadget id="calculator">3 * 6</gadget>
<output>18</output>

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

<gadget id="calculator">18 + 9 + 5</gadget>
<output>32</output>

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

<gadget id="calculator">32 / 2</gadget>
<output>16</output>

<result>16</result>