The circumference of a circular garden is 150 meters, and a tree is planted every 10 meters along the outer circle of the garden. How many trees can be planted in total.
一个圆形的花园周长是150米，沿花园的外圈每隔10米栽一棵树．一共可以栽多少棵．
<gadget id="calculator">150 / 10</gadget>
<output>15</output>

<result>15</result>