There are 378 more apple trees than pear trees in the orchard. It is known that the number of apple trees is 10 times that of pear trees. How many apple trees are there?
果园里苹果树比梨树多378棵，已知苹果树棵数是梨树的10倍，苹果树有多少棵？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">378 / 9</gadget>
<output>42</output>

<gadget id="calculator">42 * 10</gadget>
<output>420</output>

<result>420</result>