At the New Year's Gala, the number of people who asked for leave in class 2 of the four years was the number of people present (1/9), and one person left halfway, so the number of people who asked for leave was the number of people present (3/22), how many people in class 2 of the four years?
在新年联欢会上，四年2班请假人数是出席人数的(1/9)，中途又有一人离开，这样请假人数是出席人数的(3/22)，四年2班共有多少人？
<gadget id="calculator">3 + 22</gadget>
<output>25</output>

<gadget id="calculator">3 / 25</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">1 + 9</gadget>
<output>10</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(3/25) - (1/10)</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">1 / (1/50)</gadget>
<output>50</output>

<result>50</result>