Among the students reading in the reading room, there are 15 more boys than girls. Later, the number of boys decreased (1/4), and the number of girls decreased (1/6). The remaining boys and girls were equal. How many girls were there in the original reading room?
阅览室看书的同学中，男生比女生的人数多15人，后来男生减少(1/4)，女生减少(1/6)，剩下的男、女生人数相等，原来阅览室有多少名女生？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 15</gadget>
<output>15/4 = around 3.75</output>

<gadget id="calculator">15 - (15/4)</gadget>
<output>45/4 = around 11.25</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - 1 - (1/6)</gadget>
<output>-1/6 = around -0.166667</output>

<gadget id="calculator">(1/4) + (-1/6)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(45/4) / (1/12)</gadget>
<output>135</output>

<result>135</result>