The construction team planned to complete the 2,400-meter-long railway in 50 days. In fact, it repaired 12 meters more per day than the original plan. How many days will the railway be completed?
建工队计划50天修完2400米长的铁路，实际上比原计划每天多修12米，几天修完这个铁路？
<gadget id="calculator">2_400 / 50</gadget>
<output>48</output>

<gadget id="calculator">48 + 12</gadget>
<output>60</output>

<gadget id="calculator">2_400 / 60</gadget>
<output>40</output>

<result>40</result>