There are 427 roses in the garden, which are less than the rhododendrons (2/9). How many rhododendrons are there in the garden?
花园里有月季花427棵，比杜鹃花少(2/9)，花园里有杜鹃花多少颗？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 - (2/9)</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">427 / (7/9)</gadget>
<output>549</output>

<result>549</result>