The ratio of white rabbits to black rabbits in the breeding group is 6:5, and there are 250 black rabbits. How many black rabbits and white rabbits are there?
饲养小组养白兔与黑兔的只数比是6：5，其中黑兔有250只，黑兔与白兔共有多少只？
<gadget id="calculator">250 / 5</gadget>
<output>50</output>

<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<gadget id="calculator">50 * 11</gadget>
<output>550</output>

<result>550</result>