The distance between A and B is 500 meters. A total of 51 trees are planted between the two places. What is the distance between every two trees?
甲乙两地相距500米，在两地间共栽51棵树，每两棵树之间相距多少米．
<gadget id="calculator">51 - 1</gadget>
<output>50</output>

<gadget id="calculator">500 / 50</gadget>
<output>10</output>

<result>10</result>