Xiao Ming reads a story book. On the first day, he reads 24 pages, accounting for 20% of the whole book. On the second day, he reads 3/8 of the whole book. How many pages are left?
小明读一本故事书，第一天读了24页，占全书的20%，第二天读了全书的(3/8)，还剩多少页没有读？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">24 / (1/5)</gadget>
<output>120</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (1/5) - (3/8)</gadget>
<output>17/40 = around 0.425</output>

<gadget id="calculator">120 * (17/40)</gadget>
<output>51</output>

<result>51</result>