In one exam, (1/6) of the students who participated got excellent, (1/3) got good, (1/7) got middle, and the rest all failed. How many students are there?
一次考试，参加的学生中有(1/6)得优，(1/3)得良，(1/7)得中，其余全部不及格，参加考试的同学有八十多名，得优的同学有多少名．
<gadget id="calculator">42 * 2</gadget>
<output>84</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">84 * (1/6)</gadget>
<output>14</output>

<result>14</result>