There are 9 pear trees and 6 persimmon trees in the school orchard. Peach trees are three times as many as pear trees. How many peach trees are there?
学校果园中有梨树9棵，柿子树6棵．桃树是梨树的3倍，桃树有多少棵？
<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<result>27</result>