Xiao Ming reads a story book. He reads (1/5) of the whole book on the first day and (3/5) of the whole book on the second day. How much of the whole book did he read in total in two days?
小明看一本故事书，第一天看了全书的(1/5)，第二天看了全书的(3/5)，两天一共看了全书的多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(1/5) + (3/5)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>