10 boxes each contain 50 bottles of water.  Each bottle has a capacity of 12 liters and is filled up to 3/4 of its capacity.  How many liters of water altogether are contained within the bottles in the boxes?
Since each water bottle has a capacity of 12 liters, when filled up to 3/4 of capacity, each carries 3/4*12 = 
<gadget id="calculator">3/4*12</gadget>
<output>9</output>
9 liters of water.
If there are 50 bottles of water in each box, the number of liters the water bottles in a box are carrying is 50*9 = 
<gadget id="calculator">50*9</gadget>
<output>450</output>
450 liters.
In 10 boxes containing bottled water, the total number of liters in the water bottles is 450*10 =
<gadget id="calculator">450*10</gadget>
<output>4_500</output>
4500 liters.

<result>4_500</result>