Little Naughty reads a technical book. He reads (1/6) of the whole book on the first day, and reads 42 pages on the second day. How many pages are there in total?
小淘气看一本科技书，第一天看了全书的(1/6)，第二天看了42页，这时看了的页数与剩下的页数比是2：4，这本科技书一共有多少页？
<gadget id="calculator">4 + 2</gadget>
<output>6</output>

<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/3) - (1/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">42 / (1/6)</gadget>
<output>252</output>

<result>252</result>