Cara and Beejal make a poster for school. It is in the shape of a rectangle. The left side of the poster is 7 square units and the top of the poster is measured in 6 square units. What is the area in square units of the completed poster?
To find the area of the rectangle, we multiply the length by the width.
The length is given as 7 square units and the width is given as 6 square units.
Therefore, the area of the poster is 7 x 6 = 42 square units. Answer: \boxed{42}.