Lan Lan likes reading extracurricular books very much. Lan Lan read a 160-page storybook, and she read 20% of the total pages on the first day. How many pages did she read on the first day?
兰兰非常喜欢看课外书．兰兰看一本160页的故事书，第一天就看了总页数的20%，第一天看了多少页？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">160 * (1/5)</gadget>
<output>32</output>

<result>32</result>