If a tree is planted every 3 meters on one side of a 45-meter-long road, how many trees can be planted at most?
在一段长45米的公路的一边每隔3米栽一棵树，则最多可以栽多少棵树．
<gadget id="calculator">45 / 3</gadget>
<output>15</output>

<gadget id="calculator">15 + 1</gadget>
<output>16</output>

<result>16</result>