Xiao Fang's father is 27 years older than Xiao Fang. When Xiao Fang's father is 2.5 times Xiao Fang's age, how old is Xiao Fang?
小方的爸爸比小方大27岁，当小方爸爸的年龄是小方年龄的2.5倍时，小方多少岁？
<gadget id="calculator">2.5 - 1</gadget>
<output>1.5</output>

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

<result>18</result>