If a pile of coal burns 0.2 tons per day, it can be burned in 36 days, but actually burns 0.3 tons per day, how many days does it actually burn?
一堆煤如果每天烧0.2吨，36天可以烧完，实际每天烧0.3吨，实际烧了多少天？
<gadget id="calculator">36 / 0.3</gadget>
<output>120</output>

<gadget id="calculator">0.2 * 120</gadget>
<output>24</output>

<result>24</result>