There is a row of telephone poles on the road, with a total of 25 poles. The distance between two adjacent poles used to be 45 meters, but now it is changed to 60 meters. How many poles do not need to be moved?
公路上有一排电线杆，共25根，每相邻两根间的距离原来都是45米，现在要改成60米，可以有几根不需要移动？
<gadget id="calculator">25 - 1</gadget>
<output>24</output>

<gadget id="calculator">45 * 24</gadget>
<output>1_080</output>

<gadget id="calculator">1_080 / 180</gadget>
<output>6</output>

<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<result>7</result>