In response to the call for "sunshine sports activities", there are now 108 students exercising on the playground, of which girls accounted for (2/9), and then a few girls came, and the number of girls accounted for (3/10). How many more girls are here?
为了响应"开展阳光体育活动"号召，现在有108名同学在操场上锻炼身体，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">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 - (2/9)</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

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

<gadget id="calculator">(7/9) / (7/10)</gadget>
<output>10/9 = around 1.111111</output>

<gadget id="calculator">108 * (10/9)</gadget>
<output>120</output>

<gadget id="calculator">120 - 108</gadget>
<output>12</output>

<result>12</result>