There are 120 peach trees in the orchard, and the number of pear trees is three times that of peach trees. How many more pear trees are there than peach trees?
果园里有桃树120棵，梨树的棵数是桃树的3倍，梨树比桃树多多少棵？
<gadget id="calculator">120 * 3</gadget>
<output>360</output>

<gadget id="calculator">360 - 120</gadget>
<output>240</output>

<result>240</result>