The inventory tonnage ratio of A and B warehouses is 4:3. If 8 tons are taken out from warehouse A and stored in warehouse B, the ratio of inventory tonnage between warehouses A and B becomes 4:5. So, how many tons are there in total in these two warehouses?
甲乙两个仓库存货吨数比是4：3．如果由甲库中取出8吨存入乙库，则甲、乙两个仓库存货吨数比变为4：5．那么，这两个仓库共存货多少吨．
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(4/7) - (4/9)</gadget>
<output>8/63 = around 0.126984</output>

<gadget id="calculator">8 / (8/63)</gadget>
<output>63</output>

<result>63</result>