The passing rate of a mid-term test in a certain class is 95%, and 2 people fail. How many students are there in this class?
某班期中测试及格率为95%，2人不及格，这个班有学生多少人．
<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">1 - (19/20)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">2 / (1/20)</gadget>
<output>40</output>

<result>40</result>