Pour 10 liters of water into a cuboid container with a length of 20 cm and a width of 10 cm. What is the height of the water surface in cm?
把10升水倒入长20cm、宽10cm的长方体容器中，水面高多少cm．
<gadget id="calculator">20 * 10</gadget>
<output>200</output>

<gadget id="calculator">1_000 / 200</gadget>
<output>5</output>

<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<result>50</result>