There are 120 apple trees in the orchard, and 80 more pear trees than apple trees. How many pear trees are there?
果园有苹果树120棵，梨树的棵数比苹果树的2倍多80棵．梨树有多少棵．
<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<gadget id="calculator">240 + 80</gadget>
<output>320</output>

<result>320</result>