Cara and Beejal make a poster for school. The poster is in the shape of a rectangle. The left side of the poster measures 7 units; the top side of the poster measures 6 units. What is the area in square units of the completed poster?

To find the area of the rectangle, multiply the length by the width:

Area = length x width
Area = 7 units x 6 units
Area = 42 square units

Therefore, the area of the completed poster is 42 square units.