A production team with 12 people completed it in 9 days with 1620 parts. Now there is a batch of tasks, the number of parts is 2520, how many days will it take for 14 people to complete.
某生产小组12个人，9天完成，零件1620个．现在有一批任务，零件数为2520个，问14个人要多少天完成．
<gadget id="calculator">1_620 / 9 / 12</gadget>
<output>15</output>

<gadget id="calculator">15 * 14</gadget>
<output>210</output>

<gadget id="calculator">2_520 / 210</gadget>
<output>12</output>

<result>12</result>