There are 8 white swans in the pond, and the number of black swans is 7 times that of white swans, how many black swans are there?
池塘里有白天鹅8只，黑天鹅的只数是白天鹅的7倍，黑天鹅有多少只？
<gadget id="calculator">8 * 7</gadget>
<output>56</output>

<result>56</result>