A train departs at 8:00 in the morning and arrives at a certain place at 1:00 in the afternoon. It travels a total of 550 kilometers. How many kilometers per hour does the train travel on average?
一列火车上午8：00出发，下午1：00到达某地，共行驶了550千米，这列火车平均每时行驶多少千米？
<gadget id="calculator">13 - 8</gadget>
<output>5</output>

<gadget id="calculator">550 / 5</gadget>
<output>110</output>

<result>110</result>