On one side of a river bank with a length of 600 meters, plant a willow tree every 10 meters (both ends must be planted), how many willow trees are planted.
在一条长600米的河堤上的一边每隔10米栽一棵柳树(两端都要栽)，栽了柳树多少棵．
<gadget id="calculator">600 / 10</gadget>
<output>60</output>

<gadget id="calculator">60 + 1</gadget>
<output>61</output>

<result>61</result>