man was driving on the highway. He suddenly found that the mileage displayed by the stopwatch of the car was 15951, which happened to be a palindromic number (the same number read from the front and from the back). After driving for 2 hours, he found that The stopwatch just shows another palindrome number, if the speed of the car cannot exceed 100 kilometers per hour, what is the speed of the car in kilometers per hour?
有一个人在公路上驾驶，他突然发现车子的码表显示的里程数是15951，刚好是个回文数(从前面读起与从后面读起都相同的数)，行驶了2小时后，他发现码表刚好又显示另一个回文数，如果车子的时速不得超过100千米，车速为每小时多少千米．
<gadget id="calculator">16_061 - 15_951</gadget>
<output>110</output>

<gadget id="calculator">110 / 2</gadget>
<output>55</output>

<result>55</result>