Length: 18 cm

Width: 4 cm

This  rectangle  is similar to a rectangle with a length of 27 centimeters.

What is the width of the larger rectangle? (You might need to draw a smaller rectangle) Label your answer with cm -

PUT A SPACE between number and cm

See example :    10 cm

each dimensions grows by the ratio 27/18 = 3/2

So the area is
(3/2 * 18)*(3/2 * 4)

Note that this means the area gwos by a factor of (3/2)^2 = 9/4