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The volume of a rectangular prism (such as a picture frame) is calculated by multiplying its length, width, and height.
Given:
Length = 8 inches
Depth = 3 inches
Height = 10 inches
Volume = Length x Depth x Height
Volume = 8 in x 3 in x 10 in
Volume = 240 cubic inches
Therefore, the volume of the picture frame is 240 cubic inches.