Divide 4 tons of coal into 7 piles on average, and the weight of each pile is 4 tons.
把4吨煤平均分成7堆，每堆重量是4吨的多少．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

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