A 200-page story book, read the whole book (1/5) on the first day, read the remaining 20% on the second day, how many pages did you read on the second day?
一本200页的故事书，第一天看了全书的(1/5)，第二天看了剩下的20%，第二天看了多少页？
<gadget id="calculator">1 / 5</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 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">200 * (4/5) * (1/5)</gadget>
<output>32</output>

<result>32</result>