Xiaodong reads a book. He reads (1/5) of the whole book on the first day and (1/3) of the whole book on the second day. What fraction of the whole book did he read in two days? If you read a total of 160 pages in two days, how many pages are there in this book?
小冬读一本书，第一天读了全书的(1/5)，第二天读了全书的(1/3)，两天一共读了全书的几分之几？如果两天一共读了160页，这本书一共多少页？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/5) + (1/3)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">160 / (8/15)</gadget>
<output>300</output>

<result>300</result>