Uncle Wang's Internet access fee standard is: 30 yuan per month can be used for 50 hours of Internet access, and 1.5 yuan per hour for overtime. Uncle Chen paid 66 yuan in July, how much time is spent online this month?
王叔叔选择的上网收费标准是：每月交30元可以上网50时，超时每时收1.5元．7月份陈叔叔交了66元，这个月上网多少时？
<gadget id="calculator">66 - 30</gadget>
<output>36</output>

<gadget id="calculator">36 / 1.5</gadget>
<output>24</output>

<gadget id="calculator">50 + 24</gadget>
<output>74</output>

<result>74</result>