The Internet access standard chosen by Uncle Li's family is: 30 yuan per month for 50 hours of Internet access; more than 50 hours, 1.5 yuan per hour. (Uncle Li: My family surfs the Internet for 85 hours this month...) How much does Uncle Li need to pay for Internet access this month?
李叔叔家选择的上网标准是：每月30元可以上网50小时；超过50小时，每小时1.5元．(李叔叔：我家这个月上网85小时…)李叔叔该月需要缴多少元的上网费？
<gadget id="calculator">85 - 50</gadget>
<output>35</output>

<gadget id="calculator">1.5 * 35</gadget>
<output>52.5</output>

<gadget id="calculator">52.5 + 30</gadget>
<output>82.5</output>

<result>82.5</result>