An exam in a certain class has an average score of 70 points, among which (3/4) pass, and the average score of the passing students is 80 points, so what is the average score of the failing students?
某班一次考试，平均分为70分，其中(3/4)及格，及格的同学平均分为80分，那么不及格的同学平均分是多少分？
<gadget id="calculator">1 * 70</gadget>
<output>70</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 * (3/4) * 80</gadget>
<output>60</output>

<gadget id="calculator">70 - 60</gadget>
<output>10</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">10 / (1/4)</gadget>
<output>40</output>

<result>40</result>