A professional farmer raises some rabbits, including 180 black rabbits, which are white rabbits (5/6), and gray rabbits (3/4), how many gray rabbits are raised?
养殖专业户养了一些兔子，养的黑兔180只，是白兔的(5/6)，灰兔是白兔的(3/4)，问养灰兔多少只？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">180 / (5/6)</gadget>
<output>216</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">216 * (3/4)</gadget>
<output>162</output>

<result>162</result>