Factory A and Factory B each have some coal in stock, their ratio is 15:11, A has 24 tons more coal than B, the ratio of the remaining coal after they use the same coal is 7:5, ask each of the two factories to use How many tons?
甲工厂和乙工厂各有一些存煤，它们的比是15：11，甲比乙多存煤24吨，它们用去相同的煤后余下煤的比是7：5，求两厂各用去多少吨？
<gadget id="calculator">7 / 5</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">15 - 11</gadget>
<output>4</output>

<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<gadget id="calculator">(7/5) * 6 * 11</gadget>
<output>462/5 = around 92.4</output>

<gadget id="calculator">6 * 15</gadget>
<output>90</output>

<gadget id="calculator">(462/5) - 90</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">(7/5) - 1</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(12/5) / (2/5)</gadget>
<output>6</output>

<result>6</result>