A pile of coal was transported away (2/5), exactly 16 tons were transported, how many tons is this pile of coal? What is the column
一堆煤，运走了(2/5)，恰好运走了16吨，这堆煤有多少吨？列式是多少
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">16 / (2/5)</gadget>
<output>40</output>

<result>40</result>