The first workshop of the system factory binds a batch of exercise books. If 600 books are bound every hour, the task can be completed in 8 hours. If you bind 800 copies per hour, how many hours can you complete the task in advance?
制体厂一车间装订一批练习本，如果每小时装订600本，8小时可以完成任务．如果每小时装订800本，可以提前几小时完成任务？
<gadget id="calculator">8 / 800</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">600 * (1/100)</gadget>
<output>6</output>

<gadget id="calculator">8 - 6</gadget>
<output>2</output>

<result>2</result>