There are 160 apple trees planted in the orchard, which is half the number of pear trees, and the number of orange trees planted is 20 times less than twice the number of pear trees. How many orange trees are there?
果园里种了160棵苹果树，是梨树棵数的一半，而种的桔数棵数比梨树的2倍少20棵，桔数有几棵？
<gadget id="calculator">160 * 2 * 2</gadget>
<output>640</output>

<gadget id="calculator">640 - 20</gadget>
<output>620</output>

<result>620</result>