Xiaojun reads a popular science book. He reads (1/6) of the whole book on the first day and (2/5) of the whole book on the second day. He reads a total of 170 pages in two days. How many pages does this book have? (solution by equation)
小军看一本科普书，第一天看了全书的(1/6)，第二天看了全书的(2/5)，两天一共看了170页，这本书一共有多少页？(用方程解)
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/6) + (2/5)</gadget>
<output>17/30 = around 0.566667</output>

<gadget id="calculator">170 / (17/30)</gadget>
<output>300</output>

<result>300</result>