There are two piles of coal weighing (14/15) tons in total, one of which weighs (8/15) tons, and how many tons does the other pile weigh?
有两堆煤共重(14/15)吨，其中一堆重(8/15)吨，另一堆重多少吨？
<gadget id="calculator">14 / 15</gadget>
<output>14/15 = around 0.933333</output>

<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">(14/15) - (8/15)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>