road construction team will build a 1680-meter-long road. It has been built for 15 days, with an average of 60 meters per day. The remaining 12 days are completed, how many meters are built per day on average?
一个筑路队要筑1680米长的路．已经筑了15天，平均每天筑60米．其余的12天筑完，平均每天筑多少米？
<gadget id="calculator">60 * 15</gadget>
<output>900</output>

<gadget id="calculator">1_680 - 900</gadget>
<output>780</output>

<gadget id="calculator">780 / 12</gadget>
<output>65</output>

<result>65</result>