There are 150 white swans in the zoo, and the number of black swans is 8 times that of white swans. How many black swans are there?
动物园里有150只白天鹅，黑天鹅的只数是白天鹅的8倍，黑天鹅有多少只？
<gadget id="calculator">150 * 8</gadget>
<output>1_200</output>

<result>1_200</result>