There are 108 students on the playground exercising, of which girls accounted for (2/9), and later came a few girls, at this time the number of girls accounted for (3/10), and then several girls came.
操场上有108名同学在锻炼身体，其中女生占(2/9)，后来又来了几名女生，这时女生人数占(3/10)，后来又来了几名女生．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">108 * (3/10)</gadget>
<output>162/5 = around 32.4</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">108 * (2/9)</gadget>
<output>24</output>

<gadget id="calculator">108 - 108 - 24</gadget>
<output>-24</output>

<gadget id="calculator">(162/5) + (-24)</gadget>
<output>42/5 = around 8.4</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(42/5) / (7/10)</gadget>
<output>12</output>

<result>12</result>