The breeding group raises 60 chickens and 100 ducks, how much less chickens than ducks
饲养组养鸡60只，鸭100只，鸡比鸭少多少
<gadget id="calculator">100 - 60</gadget>
<output>40</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>