The engineering team will dig a 2,400-meter-long canal and plan to finish digging in 15 days. Due to the adoption of new technology, the actual daily excavation was 40 meters more than planned. How many days did it actually take to dig?
工程队要挖一条2400米长的水渠，计划15天挖完．由于采用新技术，实际每天比计划多挖40米．实际用多少天挖完？
<gadget id="calculator">2_400 / 15</gadget>
<output>160</output>

<gadget id="calculator">160 + 40</gadget>
<output>200</output>

<gadget id="calculator">2_400 / 200</gadget>
<output>12</output>

<result>12</result>