Li Dong reads a story book, the one who read the whole book on the first day (1/12) is still 5 pages short, and the one who reads the whole book the next day (1/15) has 3 more pages, leaving 206 pages. How many pages does this storybook have?
李冬看一本故事书，第一天看了全书的(1/12)还少5页，第二天看了全书的(1/15)还多3页，还剩206页．这本故事书有多少页？
<gadget id="calculator">206 - 5</gadget>
<output>201</output>

<gadget id="calculator">201 + 3</gadget>
<output>204</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 - (1/12) - (1/15)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">204 / (17/20)</gadget>
<output>240</output>

<result>240</result>