Question

Billy has 1 gallon of paint. He is going to pour it into a paint tray that measures 10 inches wide, 14 inches long, and 4 cm deep.

Answer 1

You need to state the question, what you're trying to find. By using my context clues, I'm not sure what you're asking but
Length x Width x Height so
10 x 14 = 140
140 x 4 = 260
260 = area of the paint tray