Plant trees on one side of a 240-meter-long road, planting one tree every 3 meters, how many trees can be planted in total.
在一条长240米路的一侧植树，每隔3米植一棵，共可以植树多少棵．
<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<gadget id="calculator">80 + 1</gadget>
<output>81</output>

<result>81</result>