Boys accounted for (2/5) of a certain interest group, and then 5 boys were transferred away. At this time, boys accounted for (1/5) of the total number. How many girls are there in this interest group?
某兴趣小组中男生占(2/5)，后来转走5名男生，这时男生占总人数的(1/5)，这个兴趣小组女生有多少人？
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/3) - (1/4)</gadget>
<output>5/12 = around 0.416667</output>

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

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">5 / (1/12)</gadget>
<output>60</output>

<result>60</result>