The school holds a mathematics lecture, and the audience is only students in grades four, five, and six, and there is one sixth grade student in every two people, one fifth grade student in every four people, and one fourth grade student in every six people. And there are 5 teachers in the audience. So how many people are in the audience?
学校举行数学讲座，听众中只有四、五、六三个年级的学生，且每两个人中有一个六年级学生，每四人中有一个五年级学生，每六人中有一个四年级学生．并且听众中共有5个老师．那么听众一共有多少人？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">1 - (1/2) - (1/4) - (1/6)</gadget>
<output>1/12 = around 0.083333</output>

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

<result>60</result>