There are 160 apple trees planted in the orchard, half of the pear trees, and 20 fewer pear trees than twice as many peach trees. How many peach trees are planted?
果园里种苹果树160棵，是梨树的一半，种的梨树比桃树的2倍少20棵，桃树种了多少棵？
<gadget id="calculator">160 * 2</gadget>
<output>320</output>

<gadget id="calculator">320 + 20</gadget>
<output>340</output>

<gadget id="calculator">340 / 2</gadget>
<output>170</output>

<result>170</result>