Aunt Zhang typed a manuscript. On the first day, she typed 12% of the total, and on the second day, she typed 18% of the total. In two days, she typed a total of 180 pages. How many pages does this manuscript have?
张阿姨打一份稿件，第一天打了总数的12%，第二天打了总数的18%，两天一共打了180页，这份稿件一共有多少页？
<gadget id="calculator">12 / 100</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">18 / 100</gadget>
<output>9/50 = around 0.18</output>

<gadget id="calculator">(3/25) + (9/50)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">180 / (3/10)</gadget>
<output>600</output>

<result>600</result>