Fill a cube tank with a side length of 4 decimeters with water, pour it all into a cylindrical bucket with a bottom area of 20 decimeters square and a height of 4 decimeters, how deep is the water in decimeters?
在一个棱长4分米的正方体水箱中盛满水，全部倒入一个底面积是20平方分米，高4分米的圆柱形水桶中，水深多少分米？
<gadget id="calculator">4 / 20</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4 * 4 * (1/5)</gadget>
<output>16/5 = around 3.2</output>

<result>16/5 = around 3.2</result>