The distance between A and B is 20 kilometers. Xiao Ming walks the whole distance in 5 hours. How many hours does it take on average for each kilometer?
甲，乙两地相距20千米，小明5小时走完全程，平均每走1千米用多少小时
<gadget id="calculator">5 / 20</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>