In order to beautify the road, workers design a flower bed between every two telephone poles. There are 24 telephone poles on one side of a road. How many flower beds need to be designed in total?
为了美化公路，工人在每两根电线杆之间设计一个花坛，一条公路的一边共有24根电线杆，一共需要设计多少个花坛．
<gadget id="calculator">24 - 1</gadget>
<output>23</output>

<result>23</result>