Xiaohong plans to read a story book in 20 days, so how much of the book has he read in 9 days?
一本故事书，小红计划20天看完，那么他9天看了这本书的多少
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">9 * (1/20)</gadget>
<output>9/20 = around 0.45</output>

<result>9/20 = around 0.45</result>