Xiaogang reads a story book with page a. He reads (1/5) of the whole book on the first day, and the remaining 40% on the second day. How many pages did he read on the second day?
小刚看一本a页的故事书，第一天看了全书的(1/5)，第二天看了剩下的40%，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">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(4/5) * (2/5)</gadget>
<output>8/25 = around 0.32</output>

<result>8/25 = around 0.32</result>