Mr. Li typed a manuscript, 40% on the first day, 25% on the second day, 6 pages more on the first day than on the second day, how many pages does this manuscript have?
李老师打一篇稿件，第一天打了40%，第二天打了25%，第一天比第二天多打了6页，这篇稿件有多少页？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">6 / (3/20)</gadget>
<output>40</output>

<result>40</result>