In the reading room of the school, girls accounted for 1/3 of the total number of people in the room. Later, 4 girls were transferred. At this time, the ratio of girls to the total number of people in the room was 5:13. How many people were there in the reading room?
在学校阅览室里，女生占全室人数的(1/3)，后来又转来4名女生，这时女生和全室人数的比是5：13．阅览室原来有多少人？
<gadget id="calculator">5 / 13</gadget>
<output>5/13 = around 0.384615</output>

<gadget id="calculator">1 - (5/13)</gadget>
<output>8/13 = around 0.615385</output>

<gadget id="calculator">(5/13) / (8/13)</gadget>
<output>5/8 = around 0.625</output>

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

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(1/3) / (2/3)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(5/8) - (1/2)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">4 / (1/8) / (2/3)</gadget>
<output>48</output>

<result>48</result>