A total of 11 trees are planted at both ends of one side of the boulevard. The distance between two adjacent trees is 5 meters. What is the length of the boulevard?
林荫道的一侧两端共栽了11棵树，相邻两棵树间隔均为5米，林荫道长多少米．
<gadget id="calculator">11 - 1</gadget>
<output>10</output>

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

<result>50</result>