The weight ratio of goods in warehouses A and B is 7:5. If warehouse A gives 26 tons to warehouse B, the weight ratio of goods in warehouses A and B is 3:4. How many tons of goods did Warehouse A originally have?
甲、乙两个仓库货物的重量比是7：5，如果甲仓给乙仓26吨，那么甲、乙两个仓库货物的重量比是3：4．甲仓原来有多少吨货物？
<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(7/12) - (3/7)</gadget>
<output>13/84 = around 0.154762</output>

<gadget id="calculator">26 / (13/84)</gadget>
<output>168</output>

<gadget id="calculator">168 * (7/12)</gadget>
<output>98</output>

<result>98</result>