A cuboid glass tank, measured from the inside, is 50 cm long, 40 cm wide, and 20 cm high. Now pour 1 liter of water into the glass tank, what is the depth of the water in cm?
一个长方体玻璃缸，从里面量，长50厘米，宽40厘米，高20厘米，现将1升水倒入玻璃缸中，水深多少厘米．
<gadget id="calculator">50 * 40</gadget>
<output>2_000</output>

<gadget id="calculator">1_000 / 2_000</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 * (1/2)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>