Li Ming's family raises 35 chickens, but the number of ducks is less than chickens (1/5). How many ducks are there?
李明家养鸡35只，养的鸭比鸡少(1/5)，鸭的只数是多少？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">35 * (4/5)</gadget>
<output>28</output>

<result>28</result>