There are some electric poles on one side of the road, and there is a billboard between every two electric poles. It is known that there are 25 billboards, so how many electric poles are there?
马路一边有一些电线杆，每两根电线杆中间有一个广告牌，已知广告牌有25个，那么电线杆有多少根．
<gadget id="calculator">25 + 1</gadget>
<output>26</output>

<result>26</result>