To build a road, half of the total length was repaired on the first day and the remaining 20 meters were repaired, and the remaining 100 meters were repaired on the second day, leaving 60 meters. What is the total length of this road in meters?
修一条公路，第一天修了全长的一半少20米，第二天修了余下100米，还剩下60米，这条公路全长多少米．
<gadget id="calculator">60 - 20</gadget>
<output>40</output>

<gadget id="calculator">100 + 40</gadget>
<output>140</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">140 / (1/2)</gadget>
<output>280</output>

<result>280</result>