There are 50 people in class 501, and the pass rate of a language test is 96%. How many people failed this test?
501班有50人，一次语文考试的及格率是96%，这次考试有几人不及格？
<gadget id="calculator">96 / 100</gadget>
<output>24/25 = around 0.96</output>

<gadget id="calculator">1 - (24/25)</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">50 * (1/25)</gadget>
<output>2</output>

<result>2</result>