A certain engineering team repaired a section of road, originally planned to repair 30 meters per day, and completed the task in 24 days, but actually repaired 144 meters in the first 4 days. According to this calculation, how many days will it take to complete this section of road?
某工程队修一段公路，原计划每天修30米，24天完成任务，实际前4天修了144米．照这样计算，修完这段路要多少天？
<gadget id="calculator">30 * 24</gadget>
<output>720</output>

<gadget id="calculator">144 / 4</gadget>
<output>36</output>

<gadget id="calculator">720 / 36</gadget>
<output>20</output>

<result>20</result>