The engineering team builds a road. After 16 kilometers of repairing, the ratio of the repaired to the unrepaired is 2:5, so how long is the road?
工程队修一条公路，修了16km后，已修的与未修的比是2：5，那么这条公路有多长？
<gadget id="calculator">8 * 7</gadget>
<output>56</output>

<result>56</result>