There is a batch of goods in the warehouse, and the weight ratio of the goods removed to the remaining goods is 2:7. If another 60 tons are transported away, the remaining goods are only 1/9 of the original goods in the warehouse, and the original goods in the warehouse How many tons?
仓库有一批货物，运走的货物与剩下的货物的重量比为2：7，如果又运走60吨，那么剩下的货物只有仓库原有货物的(1/9)，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">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(7/9) - (1/9)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">60 / (2/3)</gadget>
<output>90</output>

<result>90</result>