There are more white rabbits than gray rabbits (2/3), and there are 180 fewer gray rabbits than white rabbits. How many gray rabbits are there?
白兔的只数比灰兔多(2/3)，灰兔比白兔少180只，灰兔有多少只？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">180 / (2/3)</gadget>
<output>270</output>

<result>270</result>