A cuboid glass container with a length of 20 cm, a width of 10 cm, and a height of 20 cm contains some red solution. Xiao Ming wanted to know the depth of the solution. He inserted a rectangular wooden stick with a bottom side of 5 cm and a length of 1 meter vertically into the bottom of the container. After taking it out, he measured that the part of the wooden stick that was dyed red was 16 cm long. How many centimeters is the depth of the red solution in the original container?
一个长20厘米、宽10厘米、高20厘米的无盖长方体玻璃容器，里面盛有一些红色溶液．小明想知道溶液的深，他将一根底面边长5厘米，长1米的长方形木条垂直插入到容器底部，取出后量得木条被染红的部分长16厘米．原来容器内红色溶液深多少厘米．
<gadget id="calculator">20 * 10</gadget>
<output>200</output>

<gadget id="calculator">16 / 200</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">5 * 5 * (2/25)</gadget>
<output>2</output>

<gadget id="calculator">16 - 2</gadget>
<output>14</output>

<result>14</result>