"When one party is in trouble, all parties support." In the Wenchuan Earthquake Relief Campaign, Team A and Team B rushed to repair a section of the same long road at the same time. After 12 hours of work, the workload completed by the two teams is exactly equal to the total workload of Team A. After 20 hours of work, team B completed the task, and team A still needs to repair another 300 meters to complete the task. How many meters is the total length of the two repaired roads?
"一方有难，八方支援"，在汶川抗震救灾战役中，甲、乙两队同时各抢修一段同样长的公路．开工12小时后两队完成的工作量正好等于甲队的总工作量．开工20小时后乙队完成了任务，甲队还需再修300米才能完成任务．两段抢修的公路共长多少米．
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/20) * 12</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) / 12</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/30) * 20</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">300 / (1/3)</gadget>
<output>900</output>

<gadget id="calculator">900 * 2</gadget>
<output>1_800</output>

<result>1_800</result>