The happy "October" holiday is coming soon. Xiaoming's parents are going to take Xiaoming to travel by train. The one-way train fare for children is 38.5 yuan, and the one-way adult fare is twice the one-way children's fare. How much is the round-trip transportation fee for Xiao Ming's family by train?
快乐的"十一"小长假马上就到了，小明的爸爸妈妈准备带小明乘火车去旅游，火车单程儿童票价是38.5元，单程成人票价是单程儿童票价的2倍．这次旅游小明一家乘火车往返的交通费是多少元？
<gadget id="calculator">38.5 * 2 * 2</gadget>
<output>154</output>

<gadget id="calculator">154 + 38.5</gadget>
<output>192.5</output>

<gadget id="calculator">192.5 * 2</gadget>
<output>385</output>

<result>385</result>