There is an artificial lake with a circumference of 630 meters. The workers want to plant a tree every 3 meters around the lake. How many saplings are needed? How many
有一个人工湖的周长为630米，工人要在湖的周围每隔3米种一棵树，那么需要多少棵小树苗？多少
<gadget id="calculator">630 / 3</gadget>
<output>210</output>

<result>210</result>