There are 56 students in the sixth grade of Luoquan Primary School, of which girls accounted for (4/7). Later, a few female students were transferred to the school. At this time, female students accounted for (3/5) of the whole class. How many female students are transferred?
落圈小学六年级56个学生，其中女生占(4/7)，后来转进几个女同学，这时女同学占全班人数的(3/5)．转进多少个女同学？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 - (4/7)</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/7) / (2/5)</gadget>
<output>15/14 = around 1.071429</output>

<gadget id="calculator">56 * (15/14)</gadget>
<output>60</output>

<gadget id="calculator">60 - 56</gadget>
<output>4</output>

<result>4</result>