There are 20 poplar trees in the campus, and the number of willow trees is more than that of poplar trees (1/4). How many willow trees are there?
校园里有杨树20棵，柳树的棵数比杨树多(1/4)，柳树有多少棵？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

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

<result>25</result>