Two big trees are 180 meters apart, and 19 small trees are evenly replanted between the two big trees. How many meters is the distance between every two small trees?
两棵大树相距180米，在两棵大树之间均匀地补栽了19棵小树，每两棵小树的距离是多少米？
<gadget id="calculator">19 + 1</gadget>
<output>20</output>

<gadget id="calculator">180 / 20</gadget>
<output>9</output>

<result>9</result>