There is a batch of steel products, (1/3) of the total amount is used for the first time, (1/4) of the total amount is used for the second time, and finally there are 24 tons left. How many tons of this batch of steel?
一批钢材有，第一次用去总数的(1/3)，第二次用去总数的(1/4)，最后还剩24吨．原来这批钢材有多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/3) - (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">24 / (5/12)</gadget>
<output>288/5 = around 57.6</output>

<result>288/5 = around 57.6</result>