In a container 30 cm long, 20 cm wide, and 14 cm deep, pour 3 liters of water. What is the distance between the water surface and the mouth of the container?
在长30厘米，宽20厘米，深14厘米的容器中，倒入3升水，水面离这个容器口的距离是多少？
<gadget id="calculator">30 * 100</gadget>
<output>3_000</output>

<gadget id="calculator">30 * 20</gadget>
<output>600</output>

<gadget id="calculator">3_000 / 600</gadget>
<output>5</output>

<gadget id="calculator">14 - 5</gadget>
<output>9</output>

<result>9</result>