There are 450 apple trees in Qingshan Orchard, and the number of pear trees is 2/3 of that of apple trees. How many pear trees are there?
青山果园有苹果树450棵，梨树的棵数是苹果树的(2/3)，梨树有多少棵？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">450 * (2/3)</gadget>
<output>300</output>

<result>300</result>