The school shipped 4.8 tons of coal and planned to burn it for 40 days, but it ended up burning for 10 days longer. How many kilograms of coal can be saved on average every day?
学校运来4.8吨煤，计划烧40天，结果多烧了10天，平均每天节约煤多少千克？
<gadget id="calculator">4.8 / 40</gadget>
<output>0.12</output>

<gadget id="calculator">40 + 10</gadget>
<output>50</output>

<gadget id="calculator">4.8 / 50</gadget>
<output>0.096</output>

<gadget id="calculator">0.12 - 0.096</gadget>
<output>0.024</output>

<gadget id="calculator">0.024 * 1_000</gadget>
<output>24</output>

<result>24</result>