There were 42 students in Class 61 last semester, among which girls accounted for (4/7). How many female students were transferred in this semester? Now, the girls in Class 16 accounted for 3/5 of the whole class. How many students were transferred? A female classmate?
六1班上学期有学生42人，其中女生占(4/7)，这学期转进几个女同学，现在六1班的女生占了全班人数的(3/5)，请问转进几个女同学？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">42 * (4/7)</gadget>
<output>24</output>

<gadget id="calculator">42 - 24</gadget>
<output>18</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">18 / (2/5)</gadget>
<output>45</output>

<gadget id="calculator">45 - 42</gadget>
<output>3</output>

<result>3</result>