5 tons of coal are divided into 7 piles on average, and each pile occupies 5 tons of coal.
5吨煤平均分成7堆，每堆占5吨煤的多少．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>