There are 540 apple trees in the orchard, which are 1/5 more than pear trees. How many pear trees are there?
果园树有苹果树540棵，比梨树多(1/5)，梨树有多少棵？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">540 / (6/5)</gadget>
<output>450</output>

<result>450</result>