Plant trees on both sides of a road, a total of 62 trees are planted, one tree is planted every 5 meters (both ends are planted), how long is the road in meters?
在一条道路的两旁栽树，一共栽了62棵，每隔5米栽一棵(两端都栽)，这条路长多少米．
<gadget id="calculator">62 / 2</gadget>
<output>31</output>

<gadget id="calculator">31 - 1</gadget>
<output>30</output>

<gadget id="calculator">30 * 5</gadget>
<output>150</output>

<result>150</result>