The cafeteria shipped 2.4 tons of coal and planned to burn it for 6 days, but actually saved 0.08 tons per day. How many days did the coal actually burn?
食堂运来2.4吨煤，计划烧6天，实际每天节约0.08吨，这些煤实际烧多少天？
<gadget id="calculator">2.4 / 6</gadget>
<output>0.4</output>

<gadget id="calculator">0.4 - 0.08</gadget>
<output>0.32</output>

<gadget id="calculator">2.4 / 0.32</gadget>
<output>7.5</output>

<result>7.5</result>