There are 25 willows in the park, and the number of cypresses is 3/5 of that of willows and 75% of that of pine trees. How many pine trees are there in the park?
公园里有柳树25棵，柏树的棵数是柳树的(3/5)，同时又是松树的75%，公园里有多少棵松树？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/5) / (3/4)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">25 * (4/5)</gadget>
<output>20</output>

<result>20</result>