Plant trees on both sides of the road (both ends), plant one tree every 5 meters, plant a total of 22 trees from the starting point to the end point, how long is the road in meters?
在路的两侧植树(两端都植)，每隔5米植1棵，从起点到终点一共植树22棵，这条路长多少米．
<gadget id="calculator">22 / 2</gadget>
<output>11</output>

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

<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<result>50</result>