(2/3) of the number of poplar trees in the school is equal to (4/5) of the number of pagoda trees. It is known that there are 15 pagoda trees. How many poplars are there?
学校里杨树棵数的(2/3)等于槐棵数的(4/5)，已知槐树有15棵．杨树有多少棵？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) / (2/3)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">15 * (6/5)</gadget>
<output>18</output>

<result>18</result>