A circular pond has a circumference of 180 meters and a tree is planted every 3 meters. How many trees are planted in total?
一个圆形池塘，周长是180米，每隔3米栽1棵树，一共栽多少棵树．
<gadget id="calculator">180 / 3</gadget>
<output>60</output>

<result>60</result>