Uncle Li wants to deliver the goods to a place 186 kilometers away. After driving for 2.4 hours, he is still 54 kilometers away from the destination. What is the average speed of Uncle Li in kilometers?
李叔叔要到186千米远的地方送货．他开车2.4小时后离目的地还有54千米，李叔叔开车的平均速度是多少千米？
<gadget id="calculator">186 - 54</gadget>
<output>132</output>

<gadget id="calculator">132 / 2.4</gadget>
<output>55</output>

<result>55</result>