There are 2,400 chickens in the farm, accounting for 3/5 of the total, and 1/10 of ducks. How many ducks are raised in the farm?
饲养场养鸡2400只，占总数的(3/5)，鸭占总数的(1/10)，饲养场养鸭多少只？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2_400 / (3/5)</gadget>
<output>4_000</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">4_000 * (1/10)</gadget>
<output>400</output>

<result>400</result>