In the meteorological team of the fifth grade, the number of girls accounted for boys (3/4). Later, 2 girls joined this group, and the number of girls accounted for (7/8) of the boys. How many girls were there in this meteorological team?
五年级气象小组中，女生人数占男生的(3/4)，后来又有2名女生参加这个小组，女生人数占男生人数的(7/8)．问这个气象小组原来有女生多少人？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(7/8) - (3/4)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">2 / (1/8)</gadget>
<output>16</output>

<gadget id="calculator">16 * (3/4)</gadget>
<output>12</output>

<result>12</result>