A train traveled 366 kilometers in 6 hours in the morning and 666 kilometers in 6 hours in the afternoon. How much more kilometers per hour do you travel in the afternoon than in the morning?
一列火车上午6小时行了366千米，下午6小时行了666千米．下午比上午平均每小时多行多少千米？
<gadget id="calculator">666 / 6</gadget>
<output>111</output>

<gadget id="calculator">366 / 6</gadget>
<output>61</output>

<gadget id="calculator">111 - 61</gadget>
<output>50</output>

<result>50</result>