The binding team plans to bind a batch of books, 255 books per hour, which can be finished in 10 hours. If 45 more books are bound per hour than the original plan, how many hours can it be finished?
装订小组计划装订一批书，每小时装订255本，10小时可装订完，如果每小时比原计划多装订45本，几小时可以装订完？
<gadget id="calculator">255 * 10</gadget>
<output>2_550</output>

<gadget id="calculator">255 + 45</gadget>
<output>300</output>

<gadget id="calculator">2_550 / 300</gadget>
<output>17/2 = around 8.5</output>

<result>17/2 = around 8.5</result>