The Double Ninth Festival City Sports Committee organized a mountaineering competition. In the 845-meter-long mountain road. Set up a service station every 65 meters (the starting point and the end point are not set). How many service stations are there in total?
重阳节市体委组织登山比赛．在长达845米的山路中．每隔65米设一个服务站(起点和终点不设)．共设多少个服务站？
<gadget id="calculator">845 / 65</gadget>
<output>13</output>

<gadget id="calculator">13 - 1</gadget>
<output>12</output>

<result>12</result>