The number of girls in the track and field team of the school originally accounted for (1/2), and then 2 girls joined and 2 boys quit, so that the number of girls accounted for (2/3) of the total number of track and field teams. How many girls are there in the track and field team now?
学校田径队女生人数原来占(1/2)，后来又2名女生加入，2名男生退出，这样女生人数就占田径队总人数的(2/3)，现在田径队有女生多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(2/3) - (1/2)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">2 / (1/6)</gadget>
<output>12</output>

<gadget id="calculator">12 * (2/3)</gadget>
<output>8</output>

<result>8</result>