A book read 10% of the whole book on the first day, and (1/8) of the whole book on the second day, leaving 248 pages. How many pages are there in total?
一本书第一天看了全书的10%，第二天看了全书的(1/8)，还余下248页．全书一共多少页？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/10) - (1/8)</gadget>
<output>31/40 = around 0.775</output>

<gadget id="calculator">248 / (31/40)</gadget>
<output>320</output>

<result>320</result>