There are 150 pagoda trees in the botanical garden, which are 3/4 of poplar trees, and the number of poplar trees is 2/3 of the number of willow trees. How many willow trees are there in the botanical garden?
植物园有槐树150棵，是杨树的(3/4)，杨树的棵数是柳树棵数的(2/3)．植物园有柳树多少棵？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">150 / (3/4) / (2/3)</gadget>
<output>300</output>

<result>300</result>