A canteen has 4,800 kilograms of coal and plans to burn it for 40 days, but actually saves 20 kilograms per day. According to this calculation, how many days can it actually burn?
某食堂有4800千克煤，计划烧40天，实际每天节约了20千克，照这样计算，实际可烧多少天？
<gadget id="calculator">120 - 20</gadget>
<output>100</output>

<gadget id="calculator">4_800 / 100</gadget>
<output>48</output>

<result>48</result>