There are 24 trees on one side of the road from beginning to end. The distance between every two trees is 10 meters. How long is the road in meters?
公路一边从头到尾有24棵树．每两棵之间的距离是10米，这条公路全长多少米？
<gadget id="calculator">24 - 1</gadget>
<output>23</output>

<gadget id="calculator">23 * 10</gadget>
<output>230</output>

<result>230</result>