A giant salamander (salamander, a national second-class protected animal) has a head length of 9 cm, a body half of its total length, and a tail half of its head and body length. How long is this fish?
一条大鲵鱼(娃娃鱼，国家二级保护动物)，鱼头长9厘米，鱼身是全长的一半，鱼尾长度是鱼头和鱼身的二分之一，这条鱼有多长？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">13.5 / (1/2)</gadget>
<output>27</output>

<result>27</result>