An object with a volume of 1.8 cubic decimeters (completely submerged) is placed in a rectangular parallelepiped glass cylinder with a height of 20 centimeters. When it is taken out of the water, the water level will drop by 3 centimeters. What is the volume of this jar in liters.
在一个高是20厘米的长方体玻璃缸内沉放着一块体积是1.8立方分米的物件(完全浸没)，从水中捞出，水面就下降3厘米．这个玻璃缸的容积是多少升．
<gadget id="calculator">1_000 / 3</gadget>
<output>1_000/3 = around 333.333333</output>

<gadget id="calculator">20 / 1_000</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">1.8 * (1_000/3) * (1/50)</gadget>
<output>12</output>

<result>12</result>