There were 42 students in Xiao Ming's class last semester. The ratio of male students to female students was 4:3. This semester, several female students were transferred. At this time, the ratio of male students to female students was 6:5. This semester How many female students were transferred?
小明所在班级上学期有42名同学，男同学和女同学的比是4：3，这学期又转来了几名女同学，此时男同学和女同学人数的比是6：5，这学期共转来几名女同学？
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(5/6) - (3/4)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">42 * (4/7) * (1/12)</gadget>
<output>2</output>

<result>2</result>