There are 150 apple trees in the orchard, all of which are peach trees (3/5). And the peach tree happens to belong to the pear tree (7/15), how many pear trees are there in the orchard?
果园里有苹果树150棵，是桃树的(3/5)．而桃树正好是梨树的(7/15)，果园里的梨树有多少棵？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">150 / (3/5) / (2/3)</gadget>
<output>375</output>

<result>375</result>