When a typist types a manuscript, the ratio of the number of pages typed to the number of untyped pages on the first day is 1:9. If another 6 pages are typed, 15% of the manuscript can be completed. How many pages does the manuscript have in total?
打字员打一部书稿，第一天打的页数与未打的页数的比是1：9，如果再打6页，就可以完成这部稿件的15%，该稿件一共有多少页？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + 9</gadget>
<output>10</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(3/20) - (1/10)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">6 / (1/20)</gadget>
<output>120</output>

<result>120</result>