A printing factory needs to bind 72,000 children's books, and 2,700 books remain unbound after 15 days of binding. How many books are bound every day on average?
某印刷厂要装订72000本少儿读物，装订15天后还剩下2700本没有装订，平均每天装订多少本？
<gadget id="calculator">72_000 - 2_700</gadget>
<output>69_300</output>

<gadget id="calculator">69_300 / 15</gadget>
<output>4_620</output>

<result>4_620</result>