You can't calculate the volume (and thus the amount of water) a box can hold with just the surface area of one side. Here's why:

* Surface area is a measure of the total area of all the faces of a box. It tells you how much space the box takes up on its outside.

* Volume is a measure of the three-dimensional space inside the box. It tells you how much liquid the box can hold.

To calculate the volume of the box (and thus the liters of water it can hold), you need to know:

* Length: The distance along one side of the box.

* Width: The distance along another side of the box.

* Height: The distance from the bottom to the top of the box.

Here's the formula:

* Volume = Length x Width x Height

Units:

* If your measurements are in centimeters (cm), the volume will be in cubic centimeters (cm³).

* 1 liter (L) is equal to 1000 cubic centimeters (cm³).

Example:

Let's say your box has:

* Length = 20 cm

* Width = 10 cm

* Height = 5 cm

Then:

* Volume = 20 cm x 10 cm x 5 cm = 1000 cm³

* Volume in liters = 1000 cm³ / 1000 cm³/L = 1 L

Therefore, the box would hold 1 liter of water.