The cafeteria originally had 6 tons of coal. It took two days to use up 2.4 tons on the first day, equivalent to 2/3 of the tons used on the second day. Has the coal in the cafeteria been used up?
食堂原有煤6吨，用了两天，第一天用去2.4吨，相当于第二天用去吨数的(2/3)，食堂里的煤用完了吗？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2.4 / (2/3)</gadget>
<output>3.6</output>

<gadget id="calculator">3.6 + 2.4</gadget>
<output>6</output>

<result>6</result>