A city bus departs every 10 minutes from 6:00 am to 9:00 pm. How many buses are there in one day?
一辆市内公交车，从早晨6时发车到晚上9时停止，每隔10分钟发一辆车，这一天共发车多少辆？
<gadget id="calculator">900 / 10</gadget>
<output>90</output>

<gadget id="calculator">90 + 1</gadget>
<output>91</output>

<result>91</result>