There are 520 pear trees in the orchard, which are 98 fewer than apple trees. How many trees are there in total?
果园有520棵梨树，比苹果树少98棵，两种树一共有多少棵？
<gadget id="calculator">520 + 98 + 520</gadget>
<output>1_138</output>

<result>1_138</result>