There are two cuboid containers, A and B. Container A is 20 cm long, 15 cm wide, and 30 cm high, and contains water 10 cm deep; container B is 10 cm long, 10 cm wide, and 60 cm high, and contains 4 cm deep water. Now pour the same amount of water into both containers A and B until the height of the water in container B is twice the height of the water in container A. What is the height of the water in container A at this time?
有甲、乙两个长方体容器，甲容器长20厘米，宽15厘米，高30厘米，装有10厘米深的水；乙容器长10厘米，宽10厘米，高60厘米，里面装有4厘米深的水．现在向甲、乙两个容器中倒入相同多的水，直到乙容器水高是甲容器水高的2倍为止．这时甲容器中的水高是多少厘米？
<gadget id="calculator">20 * 15</gadget>
<output>300</output>

<gadget id="calculator">4_800 / 300</gadget>
<output>16</output>

<gadget id="calculator">16 + 10</gadget>
<output>26</output>

<result>26</result>