The edge length of a cube of FRP is 4 decimeters, fill it with water, and then pour the water into a cuboid tank with a length of 8 decimeters, a width of 5 decimeters, and a height of 4 decimeters. How much is the height of the water in the tank? ?
一个正方体玻璃钢的棱长是4分米，把它装满水，然后再把水倒入一个长8分米、宽5分米、高4分米的长方体水槽中，水槽中水面高多少分米？
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">4 / 40</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">4 * 4 * (1/10)</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>