A pole is erected every 45m between A and B, including the two poles at both ends, there are 65 poles erected in total. Now it is necessary to change to erect a pole every 60m. In addition to the two poles at the end, how many poles between A and B can be moved without moving?
A、B两地之间每隔45m竖一根电杆，包括两端的两根电杆在内，共竖有65根电杆，现在要改变为每隔60m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可以不必移动？
<gadget id="calculator">61 - 1</gadget>
<output>60</output>

<gadget id="calculator">45 * 60</gadget>
<output>2_700</output>

<gadget id="calculator">2_700 / 180</gadget>
<output>15</output>

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

<result>14</result>