Plant trees on one side of the road at intervals of 5 meters. A total of 10 trees are planted from the beginning to the end. How many meters is this road?
在道路的一侧植树，每隔5米植一棵，从起点到终点共植10棵，这条路有多少米．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<result>45</result>