It takes 7 days to lay a road with a length of 1 km. What is the average length of the road paved per day?
铺设一条长1千米的道路需7天完成，平均每天铺设的道路长度为多少千米．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>