It has been 27 days to build a 6,800-meter-long road, with an average of 175 meters per day. How many meters are left unfinished?
修一条6800米长的公路，已经修了27天，平均每天修175米．还剩多少米没修完？
<gadget id="calculator">175 * 27</gadget>
<output>4_725</output>

<gadget id="calculator">6_800 - 4_725</gadget>
<output>2_075</output>

<result>2_075</result>