There are 1,400 chickens in the farm, and the number of chickens is more than that of ducks (3/7). How many ducks are raised in this farm?
饲养场养鸡1400只，养的鸡只数比鸭多(3/7)，这个饲养场养鸭多少只？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 + (3/7)</gadget>
<output>10/7 = around 1.428571</output>

<gadget id="calculator">1_400 / (10/7)</gadget>
<output>980</output>

<result>980</result>