If a pile of coal burns 1.2 tons per day and burns out in 40 days, it actually burns 0.8 tons per day. How many days will it take to burn this pile of coal?
一堆煤，如果每天烧1.2吨，40天烧完，实际每天烧0.8吨，烧完这堆煤需多少天？
<gadget id="calculator">1.2 / 0.8</gadget>
<output>1.5</output>

<gadget id="calculator">40 * 1.5</gadget>
<output>60</output>

<result>60</result>