There is a pile of stones, 4 tons are taken away, which is 3/5 more than the rest, how many tons is this pile of stones?
有一堆石子，运走4吨，比剩下的多(3/5)，这堆石子有多少吨？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 + (3/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">4 / (8/5)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) + 4</gadget>
<output>13/2 = around 6.5</output>

<result>13/2 = around 6.5</result>