There are 20% more boys than girls in a class. If 2 boys are transferred and 2 girls are transferred, the number of boys and girls is exactly equal. How many students are there in this class?
某班男生比女生多20%，转走2名男生，转来2名女生后男女生人数恰好相等，这班共有学生多少．
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5) + 1</gadget>
<output>11/5 = around 2.2</output>

<gadget id="calculator">1 / (11/5)</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">(1/2) - (5/11)</gadget>
<output>1/22 = around 0.045455</output>

<gadget id="calculator">2 / (1/22)</gadget>
<output>44</output>

<result>44</result>