The freight volume of the railway freight station is constantly increasing. In order to solve the problem of freight shortage, the freight station has added a freight channel. The original plan was to lay 60 meters per day, but the actual pavement was 15 meters more than planned every day. As a result, the task was completed 6 days ahead of schedule. What is the total length of this freight corridor?
铁路货运站货运量不断增多，为解决货运紧张问题，货运站增铺设了一条货运通道，原计划每天铺设60米，实际每天比计划多铺设15米，结果提前6天完成任务．这条货运通道全长多少米．
<gadget id="calculator">60 * 6</gadget>
<output>360</output>

<gadget id="calculator">15 * 6</gadget>
<output>90</output>

<gadget id="calculator">360 + 90</gadget>
<output>450</output>

<gadget id="calculator">15 - 60</gadget>
<output>-45</output>

<gadget id="calculator">60 + (-45)</gadget>
<output>15</output>

<gadget id="calculator">450 / 15</gadget>
<output>30</output>

<gadget id="calculator">30 * 60</gadget>
<output>1_800</output>

<result>1_800</result>