The number of boys is the number of girls (7/10), then the number of girls is the number of boys.
男生人数是女生人数的(7/10)，那么女生人数是男生的多少．
<gadget id="calculator">10 / 7</gadget>
<output>10/7 = around 1.428571</output>

<result>10/7 = around 1.428571</result>