A cube water tank with a side length of 4 decimeters is filled with water, and the water is put into a cuboid water tank with a bottom area of 25.6 decimeters square. How many decimeters is the water depth?
棱长为4分米的正方体水箱内装满水，把这些水放入一个底面积是25.6平方分米的长方体水箱内，水深多少分米？
<gadget id="calculator">4 / 25.6</gadget>
<output>0.15625</output>

<gadget id="calculator">4 * 4 * 0.15625</gadget>
<output>2.5</output>

<result>2.5</result>