A pile of coal was brought from the cafeteria, 40 tons were used, accounting for (2/3) of this pile of coal, how many tons does this pile of coal weigh?
食堂运来一堆煤，用了40吨，占这堆煤的(2/3)，这堆煤重多少吨．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">40 / (2/3)</gadget>
<output>60</output>

<result>60</result>