4.5 tons of a pile of sand were transported, exactly (1/3) of which was transported away, how many tons does the pile of sand weigh in total?
一堆沙子运走了4.5吨，正好运走了全部的(1/3)，这堆沙子共重多少吨．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4.5 / (1/3)</gadget>
<output>13.5</output>

<result>13.5</result>