A road construction team undertook the task of building a road. The original plan was to repair 720 meters per day, but the actual repair was 80 meters more than the original plan, so that the actual difference of 1,200 meters could be completed 3 days earlier. How long is this road in meters?
某筑路队承担了修一条公路的任务．原计划每天修720米，实际每天比原计划多修80米，这样实际修的差1200米就能提前3天完成．这条公路全长多少米？
<gadget id="calculator">720 * 3</gadget>
<output>2_160</output>

<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<gadget id="calculator">240 - 1_200</gadget>
<output>-960</output>

<gadget id="calculator">2_160 + (-960)</gadget>
<output>1_200</output>

<gadget id="calculator">80 - 720</gadget>
<output>-640</output>

<gadget id="calculator">720 + (-640)</gadget>
<output>80</output>

<gadget id="calculator">1_200 / 80</gadget>
<output>15</output>

<gadget id="calculator">720 * 15</gadget>
<output>10_800</output>

<result>10_800</result>