telegraph pole is erected every 36 meters between A and B. Including the two telegraph poles at both ends, there are 61 telegraph poles erected in total. Now it is necessary to erect a telegraph pole every 48 meters, then in addition to the two telegraph poles at both ends, how many telegraph poles between places A and B do not need to be moved.
A、B两地之间每隔36米竖一个电线杆，包括两端的两根电线杆在内，共竖有61根电线杆．现在要改为每隔48米竖一根电线杆，那么除了两端的两根电线杆外，A、B两地之间还有多少根电线杆不必移动．
<gadget id="calculator">61 - 1</gadget>
<output>60</output>

<gadget id="calculator">36 * 60</gadget>
<output>2_160</output>

<gadget id="calculator">2_160 / 144</gadget>
<output>15</output>

<gadget id="calculator">15 - 1</gadget>
<output>14</output>

<result>14</result>