The side length of a cube glass jar is 4 decimeters. First fill it with water, and then pour all the water into a cuboid tank with a bottom area of 20 square decimeters. How many decimeters is the water level in the tank?
一个正方体玻璃缸的棱长为4分米，先把它装满水，再把这些水全部倒入一个底面积为20平方分米的长方体水槽中．槽里的水面高多少分米？
<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>