A road with a length of 500m is built, and 80m is repaired on the first day, and the same amount is repaired on the second day as on the first day. How many meters of this road are left to be repaired?
修一条长500m的公路，第一天修了80m，第二天修的和第一天修的同样多，这段公路还剩多少米没有修？
<gadget id="calculator">500 - 80 - 80</gadget>
<output>340</output>

<result>340</result>