Xiao Wei took a hound to ride a bike away from home to Zhaobaoshan, 26 kilometers away, for an outing. He was riding at a speed of 18 kilometers per hour, and the running speed of the hound was twice the speed of the bike. When the hunting dog reaches the foot of Zhaobao Mountain, if Xiaowei has not yet arrived, it will immediately go back and run to meet Xiaowei, and then run to Zhaobao Mountain when it meets Xiaowei, and run back and forth in this way until Xiaowei reaches Zhaobao Mountain. At this time, how many kilometers did the hound run in total?
小巍带着一条猎犬骑车离家到26千米远的招宝山郊游，他骑车速度是每小时18千米，猎犬奔跑速度是骑车速度的2倍．当猎犬跑到招宝山脚下后，如小巍还未到，则马上返回迎着小巍跑去，遇到小巍后再跑向招宝山，…这样来回跑一直到小巍到招宝山为止．这时，这只猎犬一共跑了多少千米路．
<gadget id="calculator">13 / 9</gadget>
<output>13/9 = around 1.444444</output>

<gadget id="calculator">18 * 2 * (13/9)</gadget>
<output>52</output>

<result>52</result>