Uncle Zhang is going to plant trees around the circular pond. The perimeter of the pond is 150 meters, and one tree is planted every 10 meters, how many trees should be planted in total.
张伯伯准备在圆形池塘周围栽树．池塘的周长是150米，每隔10米栽一棵，一共要栽多少棵．
<gadget id="calculator">150 / 10</gadget>
<output>15</output>

<result>15</result>