It is planned to build a 3,600-meter road in 20 days, but the actual repair is 20 meters more than planned every day. How many days did it actually take to complete the road?
要修一条3600米的路，计划20天修完，但实际每天比计划多修20米，实际用了多少天修完这条路？
<gadget id="calculator">3_600 / 20</gadget>
<output>180</output>

<gadget id="calculator">180 + 20</gadget>
<output>200</output>

<gadget id="calculator">3_600 / 200</gadget>
<output>18</output>

<result>18</result>