During the summer vacation, Li Fang read a famous book. He read the whole book (1/6) on the first day and 42 pages on the second day. This means that the ratio of the remaining pages to the number of pages read is 3:2. How many pages does this book have?
暑期里，李方看一本名著，第一天看了全书的(1/6)，第二天看了42页，这是余下的页数与已看的页数之比是3：2，这本书一共有多少页？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

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

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

<gadget id="calculator">(2/5) - (1/6)</gadget>
<output>7/30 = around 0.233333</output>

<gadget id="calculator">42 / (7/30)</gadget>
<output>180</output>

<result>180</result>