To build a road with a length of 1960 meters, 80 meters was repaired every day at first. After 8 days of repairing, in order to finish it as soon as possible, I plan to build an additional 40 meters per day in the future. How many days will it take to complete the repair?
修一条长1960米的路，先是每天修80米，修了8天以后为了尽快完成，以后打算每天多修40米，还要多少天才能修完？
<gadget id="calculator">80 * 8</gadget>
<output>640</output>

<gadget id="calculator">1_960 - 640</gadget>
<output>1_320</output>

<gadget id="calculator">80 + 40</gadget>
<output>120</output>

<gadget id="calculator">1_320 / 120</gadget>
<output>11</output>

<result>11</result>