His mother is 27 years older than Xiao Liang. When his mother is 2.5 times Xiao Liang's age, how old is Xiao Liang?
妈妈比小亮大27岁，当妈妈的年龄是小亮的2.5倍时，小亮几岁？
<gadget id="calculator">2.5 - 1</gadget>
<output>1.5</output>

<gadget id="calculator">27 / 1.5</gadget>
<output>18</output>

<result>18</result>