The average score of a test in a certain class is 76, and 80% of them pass. Their average score is 80. What is the average score of those who fail?
某班一次考试的平均数是76分，其中80%的人及格，他们的平均分是80分，求不及格的人的平均分是多少分？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">80 * (4/5)</gadget>
<output>64</output>

<gadget id="calculator">76 - 64</gadget>
<output>12</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">12 / (1/5)</gadget>
<output>60</output>

<result>60</result>