According to "the number of boys is (3/4) of the number of girls", you can write the quantitative relationship: how many.
根据"男生人数是女生人数的(3/4)"，可以写出数量关系式：多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>