Originally, there were girls in the library (2/5) of the total number of people. Later, 24 girls went out. At this time, the number of girls in the library accounted for (1/4) of the total number of people in the library. How many people are there in the library?
图书馆原来有女生占总人数的(2/5)，后来有24名女生出去了，这时女生人数占有图书馆总人数的(1/4)．问图书馆原有多少人？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(2/5) / (3/5)</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(1/4) / (3/4)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(2/3) - (1/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">24 / (1/3) / (3/5)</gadget>
<output>120</output>

<result>120</result>