A typist wants to print a manuscript, and plans to print 28 pages per day, which can be completed in 15 days, but actually completed the task 3 days ahead of schedule, how many pages are actually printed per day? (Solve with ratio)
一位打字员要打印一部书稿，计划每天打印28页，15天可以完成，实际提前3天就完成了任务，实际每天打印多少页？(用比例解)
<gadget id="calculator">28 * 15</gadget>
<output>420</output>

<gadget id="calculator">15 - 3</gadget>
<output>12</output>

<gadget id="calculator">420 / 12</gadget>
<output>35</output>

<result>35</result>