There are 30 geese in the pond, which belong to ducks (5/6), how many ducks are there?
塘里有鹅30只，是鸭的(5/6)，鸭有多少只．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">30 / (5/6)</gadget>
<output>36</output>

<result>36</result>