Plant trees from one side of the road, one tree at 10 meters, and plant at both ends, how many trees should be planted at 100 meters.
从路的一边植树，10米一棵，两端都种，100米要植多少棵树．
<gadget id="calculator">100 / 10</gadget>
<output>10</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<result>11</result>