Xiaoming's family has 12 white rabbits, which are the number of black rabbits (3/5). How many black rabbits are there?
小明家养白兔12只，是黑兔只数的(3/5)，养黑兔多少只？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">12 / (3/5)</gadget>
<output>20</output>

<result>20</result>