The engineering team repaired a road. After a few days of repairing, the ratio of the repaired to the unrepaired was 3:5, and then 42 meters were repaired. At this time, the ratio of the repaired to the unrepaired was 5:6. How long is this road? ?
工程队修一条公路，修了几天后，已修的与未修的比是3：5，后来又修了42米，这时已修的与未修的比5：6，这条公路有多长？
<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(5/11) - (3/8)</gadget>
<output>7/88 = around 0.079545</output>

<gadget id="calculator">42 / (7/88)</gadget>
<output>528</output>

<result>528</result>