There are 320 apple trees planted in an orchard. The number of pear trees is 62.5% of that of apple trees and 80% of that of peach trees. How many peach trees are there?
一个果园种苹果树320棵，梨树的棵树是苹果树的62.5%，是桃树的80%，桃树有多少棵？
<gadget id="calculator">512 / 0.8</gadget>
<output>640</output>

<result>640</result>