There are 56 students reading in the reading room of a certain school, of which girls accounted for (2/7), and then a few girls came to read, at this time the number of girls just accounted for (3/8) of the total number of readers, and then came again How many girls come to read?
某校阅览室里有56名学生在看书，其中女生占(2/7)，后来又来了几名女生看书，这时女生人数正好占全部看书人数的(3/8)，后来又来了多少名女生来看书？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">56 * (3/8)</gadget>
<output>21</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">56 * (2/7)</gadget>
<output>16</output>

<gadget id="calculator">56 - 56 - 16</gadget>
<output>-16</output>

<gadget id="calculator">21 + (-16)</gadget>
<output>5</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

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

<result>8</result>