The little elf reads a book. On the first day, he reads (3/5) of the whole book. On the second day, he reads less (1/5) of the whole book than on the first day. How much did he read in total in two days?
小精灵看一本书，第一天看了全书的(3/5)，第二天比第一天少看了全书的(1/5)，两天共看了多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/5) - (1/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) + (3/5)</gadget>
<output>1</output>

<result>1</result>