The school brought a pile of coal. If you burn 0.2 tons per day, you can burn it out in 36 days. Actually burned 0.1 tons more per day, how many days did it actually burn?
学校运来一堆煤．如果每天烧0.2吨，36天可以烧完．实际每天多烧了0.1吨，实际烧了多少天？
<gadget id="calculator">0.2 * 36</gadget>
<output>7.2</output>

<gadget id="calculator">0.2 + 0.1</gadget>
<output>0.3</output>

<gadget id="calculator">7.2 / 0.3</gadget>
<output>24</output>

<result>24</result>