The first bus from A to B departs every day at 7:00, then every 2 hours, and the last bus departs at 7:00 in the evening. How many shifts are there per day?
从甲地开往乙地的客车每天最早一班是7：00开出，然后每隔2小时发出一班，最后一班是晚上7：00开出．每天共有多少个班次？
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<result>7</result>