A bus terminal sends out 5 cars in 20 minutes (the departure interval is the same), so how many cars will be sent out from 7:00 am to 9:00 pm in a day.
一个公交车总站20分钟发出5辆车(发车间隔时间相同)，照这样计算，从上午7时到晚上9时一天要发出多少辆车．
<gadget id="calculator">9 + 12</gadget>
<output>21</output>

<gadget id="calculator">21 - 7</gadget>
<output>14</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<gadget id="calculator">60 / 5</gadget>
<output>12</output>

<gadget id="calculator">14 * 12</gadget>
<output>168</output>

<gadget id="calculator">168 + 1</gadget>
<output>169</output>

<result>169</result>