To find the area of a rectangle, we multiply the length by the width. In this case, the length of the rectangle is 6 cm and the width is 3 cm. Thus, the area of the rectangle is 6 cm x 3 cm = 18 square centimeters. Answer: \boxed{18}.
A traffic sign is in the shape of a square with each side equal to 20 inches. What is the area of the sign in square inches?
