The ratio of boys to girls in a class is 3:4, and the number of boys is equal to the number of girls.
某班男生与女生人数的比是3：4，男生数是女生数的多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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