sidewalk is 400 meters long. On one side of the sidewalk, 51 camphor trees (both ends are planted) are planted. How many meters are the average distance between each two trees?
一条人行道长400米，在这条人行道的一边从头到尾种了51棵香樟树(两端都种)，平均每两棵树相距多少米？
<gadget id="calculator">51 - 1</gadget>
<output>50</output>

<gadget id="calculator">400 / 50</gadget>
<output>8</output>

<result>8</result>