If the number of girls accounts for 3/5 of the whole class, then the number of boys is equal to the number of girls
女生人数占全班人数的(3/5)，则男生人数相当于女生人数的多少
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>