The engineering team repaired a road, 150 meters in the first week, and 250 meters in the second week. At this time, 60% of the total length is left. How long is the total length of this road?
工程队修一条公路，第一周修了150米，第二周修了250米，这时还剩下全长的60%，这条公路全长多少米？
<gadget id="calculator">150 + 250</gadget>
<output>400</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">400 / (2/5)</gadget>
<output>1_000</output>

<result>1_000</result>