If the ratio of male to female in a class is 4:3, how many girls account for the total number of students in the class?
某班男女人数的比是4：3，女生人数占全班人数的多少
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<result>3/7 = around 0.428571</result>