A project with 18 people working 8 hours a day can be completed in 15 days. If 27 people are used to complete the project in 8 days, how many hours do you need to work every day?
一项工程18个人每天工作8小时，15天可以完成．如果用27人去做，8天完成，每天需要工作几小时？
<gadget id="calculator">18 * 8 * 15</gadget>
<output>2_160</output>

<gadget id="calculator">27 * 8</gadget>
<output>216</output>

<gadget id="calculator">2_160 / 216</gadget>
<output>10</output>

<result>10</result>