There is a batch of goods in the warehouse, and the goods transported away are 2/7 of the quality of the remaining goods. If 64 tons are transported away, then the remaining goods are only 3/5 of the original goods in the warehouse. How many tons of cargo?
仓库有一批货物，运走的货物是剩下货物质量的(2/7)，如果又运走64吨，那么这时剩下的货物只有仓库原有货物的(3/5)，仓库原有货物多少吨？
<gadget id="calculator">2 + 7</gadget>
<output>9</output>

<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(7/9) - (3/5)</gadget>
<output>8/45 = around 0.177778</output>

<gadget id="calculator">64 / (8/45)</gadget>
<output>360</output>

<result>360</result>