To plant trees equidistantly on a runway of 1200 meters, how many trees should be planted at least to ensure that the distance between at least two trees is less than 15.
在1200米的跑道上等距离植树，最少要种多少棵树，才能保证至少有两棵树之间的距离小于15．
<gadget id="calculator">1_200 / 15</gadget>
<output>80</output>

<gadget id="calculator">80 + 1 + 1</gadget>
<output>82</output>

<result>82</result>