A typist needs to type an 83-page manuscript, 20 pages have been typed in the first 3 days, and the rest needs to be completed in a week. How many pages are typed per day on average?
打字员要打一份83页的文稿，前3天打了20页，剩下的要在一星期完成，平均每天要打多少页？
<gadget id="calculator">83 - 20</gadget>
<output>63</output>

<gadget id="calculator">63 / 7</gadget>
<output>9</output>

<result>9</result>