Xiaoyan has 20 children's books, 20% less than Xiaoying. How many children's books does Xiaoying have? What is the correct column
小燕有20本儿童读物，比小英少20%，小英有多少本儿童读物？正确的列式是多少
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

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

<result>25</result>