It is necessary to erect a 7,200-meter-long cable, and it is planned to complete the task in 12 days, but the task is actually completed 3 days ahead of schedule. How many meters are actually erected per day?
要架一条7200米长的电缆，计划12天完成任务，实际提前3天完成任务，实际每天架设多少米？
<gadget id="calculator">12 - 3</gadget>
<output>9</output>

<gadget id="calculator">7_200 / 9</gadget>
<output>800</output>

<result>800</result>