There are 80 ginkgo trees in the park, and the number of willow trees is 8 times that of ginkgo trees. How many willow trees are there?
公园里有银杏树80棵，柳树的棵数是银杏树的8倍，柳树有多少棵？
<gadget id="calculator">80 * 8</gadget>
<output>640</output>

<result>640</result>