There are 1500 pagoda trees, the number of poplars is pagoda tree (2/3), and the number of willow trees is (2/7), how many willow trees are there?
有槐树1500棵，杨树的棵数是槐树的(2/3)，又是柳树的(2/7)，柳树有多少棵？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(2/3) / (2/7)</gadget>
<output>7/3 = around 2.333333</output>

<gadget id="calculator">1_500 * (7/3)</gadget>
<output>3_500</output>

<result>3_500</result>