The ratio of male to female students in a certain class is 5:8, how many more girls than boys?
某班男女生人数比是5：8，女生比男生人数多多少．
<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>