If a cube glass bottle whose edge length is 20cm measured from the inside is filled with water, and then the water is poured into a cuboid container with a bottom area of 10dm**2 and a height of 4dm, what is the depth of the water in dm?
如果把一个从里面量棱长是20cm的正方体玻璃瓶装满水，再把水倒入底面积为10dm**2，高4dm的长方体容器里，这时水深是多少dm？
<gadget id="calculator">20 / 10</gadget>
<output>2</output>

<gadget id="calculator">20 / 10 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 * 2 * (1/5)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>