The canteen of Tongle Primary School has 3,000 kilograms of coal stored in it. The original plan was to burn it out in 25 days, but the actual saving was 45 kilograms per day compared to the original plan. How many days did it actually burn out?
同乐小学食堂存煤3000千克，原计划25天烧完，实际每天比原计划节约45千克．实际多少天烧完？
<gadget id="calculator">3_000 / 25</gadget>
<output>120</output>

<gadget id="calculator">120 - 45</gadget>
<output>75</output>

<gadget id="calculator">3_000 / 75</gadget>
<output>40</output>

<result>40</result>