The rectangle is 0.04 m wide and 0.8 m long. What is the area of this rectangle?

From the analysis of the condition of the problem, it is necessary to use the formula for finding the area of a rectangle when solving. Let’s find a solution to the problem by actions. At the same time, we will provide detailed explanations for each of them:
1. We transform the values: in 1 meter 100 centimeters, based on this, 0.04 m = 4 cm, 0.8 m = 80 cm.
2. We use the geometric formula for calculating the area of a rectangle. The area is equal to the product of length and width. Thus, the area of the rectangle = 0.04 × 0.8 = 0.032 m2 or area = 4 × 80 = 320 cm2.
Answer: 320 cm2, 0.032 m2.