If the ratio of boys to girls is 8:5, how much more boys than girls
男生和女生人数的比是8：5，则男生比女生多多少
<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>