Find the area of a rectangle whose sides are equal: 2m and 30 dm.

The area of a rectangle is defined as the product of the values of its larger and smaller sides.
We can start calculating the area only if the values of the side lengths are expressed in the same length units. Since the conditions do not indicate in which units the answer should be given, we choose 1 meter for the main one. Let’s translate 30 dm in meters.
One meter contains 10 decimeters. Means:
30 dm = 30/10 = 3 m.
Determine the area of the rectangle:
2 * 3 = 6 m².
Answer: the area of the rectangle is 6 m².