The bookbinding team ordered a batch of books. The original plan was to bind 240 volumes per day, which could be finished in 15 days. As a result, the task was completed 3 days ahead of schedule. How many more volumes were actually bound each day?
装订小组装订一批图书，原计划每天装订240册，15天可以装订完，结果提前3天完成任务，实际每天多装订多少册？
<gadget id="calculator">15 - 3</gadget>
<output>12</output>

<gadget id="calculator">15 / 12</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">240 * (5/4)</gadget>
<output>300</output>

<gadget id="calculator">300 - 240</gadget>
<output>60</output>

<result>60</result>