There are 180 more chickens than ducks, and 1/6 fewer ducks than chickens. How many ducks are there?
鸡比鸭多180只，鸭比鸡少(1/6)，鸭有多少只？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">180 / (1/6)</gadget>
<output>1_080</output>

<gadget id="calculator">1_080 - 180</gadget>
<output>900</output>

<result>900</result>