On one side of a tree-lined avenue, there are 86 electric poles in total. How many meters are there between the poles in this tree-lined avenue with a total length of 1700 meters?
在一条绿荫大道的一侧从头到尾坚电线杆，共用电线杆86根，这条绿荫大道全长1700米线杆相隔多少米？
<gadget id="calculator">86 - 1</gadget>
<output>85</output>

<gadget id="calculator">1_700 / 85</gadget>
<output>20</output>

<result>20</result>