Dad is going on a business trip to Guangzhou. If he takes a plane when he goes there and takes a train when he comes back, it will take a total of 29 hours; So, if you take the train back and forth, how much will it cost?
爸爸要到广州出差，如果去时坐飞机，回来时坐火车，共需要29小时；如果来回都坐飞机，只需要6小时．那么，如果来回都坐火车，共需要多少？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">29 - 3</gadget>
<output>26</output>

<gadget id="calculator">1 / 26</gadget>
<output>1/26 = around 0.038462</output>

<gadget id="calculator">2 / (1/26)</gadget>
<output>52</output>

<gadget id="calculator">1 * 52</gadget>
<output>52</output>

<result>52</result>