A road is 150 meters long, and a tree is planted every 10 meters from the beginning to the end on one side of the road. How many trees should be planted in total?
一条路长150米，在路的一侧从头到尾每隔10米栽一棵树，一共要栽多少棵．
<gadget id="calculator">150 / 10</gadget>
<output>15</output>

<gadget id="calculator">15 + 1</gadget>
<output>16</output>

<result>16</result>