A car comes to the bus station every 10 minutes, the first car arrives at 6:00 in the morning, and how many cars come by 7:30.
汽车站每隔10分钟来一辆车，早晨6：00开来第一辆车，到7：30共来了多少．
<gadget id="calculator">90 / 10</gadget>
<output>9</output>

<gadget id="calculator">9 + 1</gadget>
<output>10</output>

<result>10</result>