Two cuboid containers, A and B, have a ratio of bottom area of 4:5. The water depth of container A is 8 cm, and the water depth of container B is 12 cm. Then, pour the same amount of water into the two containers until the water depths are equal. In this way, the water surface of container A should be How many centimeters does it rise?
甲、乙两个长方体容器，底面积之比为4：5，甲容器水深8厘米，乙容器水深12厘米，再往两个容器注入同样多的水，直到水深相等，这样甲容器的水面应上升多少厘米？
<gadget id="calculator">12 / 5</gadget>
<output>12/5 = around 2.4</output>

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

<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">12 - 8</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">4 / (1/20) / 4</gadget>
<output>20</output>

<result>20</result>