Among the students in Class 1, boys accounted for 4/7 of the whole class. After transferring 2 girls, the ratio of boys and girls was 3:2. How many students are there in this class?
六1班学生中，男生占全班人数的(4/7)，转走2名女生后，男女生人数的比是3：2，这个班共有学生多少人？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

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

<gadget id="calculator">(4/7) / (3/5)</gadget>
<output>20/21 = around 0.952381</output>

<gadget id="calculator">1 - (20/21)</gadget>
<output>1/21 = around 0.047619</output>

<gadget id="calculator">2 / (1/21)</gadget>
<output>42</output>

<result>42</result>