The road construction team repaired a section of road. On the first day, 80 meters were repaired, which was exactly 20% of the section of the road. How many meters were left to be repaired?
修路队修一段路，第一天修了80米，正好是这段路的20%，还剩下多少米没有修？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">80 / (1/5)</gadget>
<output>400</output>

<gadget id="calculator">400 - 80</gadget>
<output>320</output>

<result>320</result>