There is a section of highway 868 meters long, and a tree is planted at an interval of 62 meters on both sides of the road. How many saplings are needed?
有一段公路长868米，在路的两旁间隔62米种一棵树，需要多少棵树苗？
<gadget id="calculator">868 / 62</gadget>
<output>14</output>

<gadget id="calculator">14 + 1</gadget>
<output>15</output>

<gadget id="calculator">15 * 2</gadget>
<output>30</output>

<result>30</result>