The ratio of goats to sheep is 4:5, so how much less goats than sheep
山羊和绵羊的只数比是4：5，所以山羊比绵羊少多少
<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>