Length has the same meaning as long in the question, Width has the same meaning as wide in the question and height has the same meaning as tall in the question.

With this information you can make use of the formula for finding the volume of a rectangular box given below

V=Length x Width x height

Remember if a box has all sides equal, it is called a cube and but in the question above you have a rectangular box.

Please let me know if you want further elaboration.