A city bus, from 7:00 am to 9:00 pm, distributes one bus every 10 times, how many buses are there in total on this day?
一辆市内公共汽车，从早晨7时发车到晚上9时停止，每隔10分发一辆车，这一天共发车多少辆？
<gadget id="calculator">840 / 10</gadget>
<output>84</output>

<gadget id="calculator">84 + 1</gadget>
<output>85</output>

<result>85</result>