The ratio of male to female students in Guangming Primary School was 8:5, and then 12 girls were transferred. At this time, the ratio of male to female students was 10:7. How many girls are there in the school?
光明小学原有男女生人数比是8：5，后又转来12名女生，这时男女生人数比是10：7，学校现有女生多少人？
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(7/10) - (5/8)</gadget>
<output>3/40 = around 0.075</output>

<gadget id="calculator">12 / (3/40)</gadget>
<output>160</output>

<gadget id="calculator">160 * (7/10)</gadget>
<output>112</output>

<result>112</result>