There are 48 students in Class 1 of June. Girls account for 3/8 of the whole class. Later, some girls were transferred. At this time, the number of girls was exactly 2/5 of the whole class. How many girls were transferred?
六1班有学生48人，女生占全班人数的(3/8)，后来又转来女生若干人，这时女生人数恰好是全班人数的(2/5)，转来女生多少人？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

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

<gadget id="calculator">48 * (5/8)</gadget>
<output>30</output>

<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">30 / (3/5)</gadget>
<output>50</output>

<gadget id="calculator">50 - 48</gadget>
<output>2</output>

<result>2</result>