The cafeteria shipped 960 kg of coal and planned to burn it for 20 days, but actually saved 8 kg per day compared to the plan. How many days did it actually burn?
食堂运来960千克煤，计划烧20天，实际每天比计划节约8千克，实际烧了多少天？
<gadget id="calculator">960 / 20</gadget>
<output>48</output>

<gadget id="calculator">48 - 8</gadget>
<output>40</output>

<gadget id="calculator">960 / 40</gadget>
<output>24</output>

<result>24</result>