There are 360 peach trees in the orchard of the Agricultural Expo Garden, 30 fewer than three times the number of pear trees. How many pear trees are there?
农博园的果树园中有桃树360棵，比梨树的3倍少30棵．有梨树多少棵？
<gadget id="calculator">360 + 30</gadget>
<output>390</output>

<gadget id="calculator">390 / 3</gadget>
<output>130</output>

<result>130</result>