An engineering team planned to use 30 people in 20 days to repair a 6,000-meter-long road. In actual work, 20 people were added, and each person repaired 2 meters more than planned every day. How many days did it actually take to build this road?
一个工程队计划用30人20天修好一条长6000米的公路，实际工作时增加了20人，每人每天比计划多修2米．实际用了多少天修完这条路？
<gadget id="calculator">30 + 20</gadget>
<output>50</output>

<gadget id="calculator">6_000 / 30 / 20</gadget>
<output>10</output>

<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<gadget id="calculator">50 * 12</gadget>
<output>600</output>

<gadget id="calculator">6_000 / 600</gadget>
<output>10</output>

<result>10</result>