The number of girls in the track and field team of the school used to be 1/3, and 6 girls joined later. Such girls accounted for 4/9 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(1/3)，后来又有6名女生加入，这样的女生就占田径队总人数的(4/9)，田径队现在有女生多少人？
<gadget id="calculator">9 - 4</gadget>
<output>5</output>

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

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

<gadget id="calculator">(4/5) - (1/2)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">6 / (3/10)</gadget>
<output>20</output>

<gadget id="calculator">20 * (4/5)</gadget>
<output>16</output>

<result>16</result>