There are twice as many apple trees as pear trees in the orchard. If there are 456 fruit trees in total, how many pear trees are there?
果园里苹果树的棵树是梨树的2倍，如果一共有456棵果树，梨树有多少棵？
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">456 / 3</gadget>
<output>152</output>

<result>152</result>