A certain class collects movie fees, the number of people who have not paid is the number of people who have paid (1/7), and later 2 people have paid, and the number of people who have not paid at this time is the number of people who have paid (1/11) , How many students are there in this class?
某班收电影费，没交钱的人数是已交钱人数的(1/7)，后来又有2人交了钱，这时没交钱的人数是已交钱人数的(1/11)，这个班共有学生多少人？
<gadget id="calculator">1 + 7</gadget>
<output>8</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 + 11</gadget>
<output>12</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/8) - (1/12)</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">2 / (1/24)</gadget>
<output>48</output>

<result>48</result>