How many trees should be planted at intervals of 9 meters (both ends are planted) on the side of a path with a length of 315 meters?
在一条长315米的小路一旁种树，每隔9米种一棵(两端都种)共要种多少棵．
<gadget id="calculator">315 / 9</gadget>
<output>35</output>

<gadget id="calculator">35 + 1</gadget>
<output>36</output>

<result>36</result>