The number of girls in the sixth grade of a certain elementary school used to be 80% of the number of boys, and then 2 girls were transferred. At this time, the number of boys was 120% of the number of girls. How many people were there in the whole grade?
某小学六年级原来女生人数是男生的80%，后转来女生2人，这时男生人数是女生的120%，原来全级有多少人？
<gadget id="calculator">120 / 100</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1 / (6/5)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(5/6) - (4/5)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">2 / (1/30)</gadget>
<output>60</output>

<gadget id="calculator">60 * (4/5)</gadget>
<output>48</output>

<gadget id="calculator">48 + 60</gadget>
<output>108</output>

<result>108</result>