Xiao Ming travels 25 kilometers in 4 hours, how many hours does it take on average to travel 1 kilometer?
小明4小时行25千米，行1千米平均要多少小时．
<gadget id="calculator">4 / 25</gadget>
<output>4/25 = around 0.16</output>

<result>4/25 = around 0.16</result>