There are 156 peach trees in the orchard, and the number of peach trees is twice that of apple trees. How many peach trees and apple trees are there?
果园里有桃树156棵，桃树的棵数是苹果树的2倍，桃树和苹果树共有多少棵？
<gadget id="calculator">156 / 2</gadget>
<output>78</output>

<gadget id="calculator">78 + 156</gadget>
<output>234</output>

<result>234</result>