There are 45 rabbits raised in the school, among which (3/5) are black rabbits, how many black rabbits are there?
学校饲养了45只兔子，其中(3/5)是黑兔，黑兔有多少只？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">45 * (3/5)</gadget>
<output>27</output>

<result>27</result>