A row of trees is planted on both sides of a 150-meter-long road, the starting point and the ending point are planted, and the distance between every two adjacent trees is equal. A total of 102 trees were planted. How many meters is the distance between every two adjacent trees?
在一条长150米的大路两旁各栽一行树，起点和终点都栽，每相邻两棵树之间的距离相等．一共栽了102棵，每相邻两棵树之间的距离为多少米？
<gadget id="calculator">102 / 2</gadget>
<output>51</output>

<gadget id="calculator">51 - 1</gadget>
<output>50</output>

<gadget id="calculator">150 / 50</gadget>
<output>3</output>

<result>3</result>