My brother is 12 years older than Xiaoli this year, and my brother is four times as old as Xiaoli. How old is my brother this year?
哥哥今年比小丽大12岁，哥哥的年龄是小丽的四倍，哥哥今年多少岁．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<result>16</result>