Red Star Farm raises 1200 chickens, which is 1/3 less than ducks. How many ducks are there?
红星饲养场养鸡1200只，比鸭少(1/3)，养的鸭有多少只？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1_200 / (2/3)</gadget>
<output>1_800</output>

<result>1_800</result>