If eight liters is 20% the capacity of a container filled with water, calculate the total capacity of 40 such containers filled with water.
If eight liters is 20% the capacity of a container filled with water, when the container is full, which is 100%, the container will contain 100%/20% * 8 liters= 40 liters.
The total capacity of 40 such containers filled with water is 40*40 = 
<gadget id="calculator">40*40</gadget>
<output>1_600</output>
1600 liters.

<result>1_600</result>