A pile of 40 tons of coal can be burned for 15 days. The average daily ((())/(())) of this pile of coal, and the average of 5 days of burning this pile of coal ((())/(())) Burn how many tons per day.
一堆煤40吨，可以烧15天，平均每天烧这堆煤的((())/(()))，5天烧这堆煤的((())/(()))，平均每天烧多少吨．
<gadget id="calculator">5 / 15</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / (1/3) / 1</gadget>
<output>3</output>

<gadget id="calculator">8 / 3</gadget>
<output>8/3 = around 2.666667</output>

<result>8/3 = around 2.666667</result>