There are 450 apple trees and pear trees in the orchard. Every apple tree is 2/3 the number of pear trees. How many pear trees are there?
果园里有苹果树和梨树共450棵，苹果树的棵树是梨树的(2/3)，梨树有多少棵？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">450 / (5/3)</gadget>
<output>270</output>

<result>270</result>