Answer:
To convert square millimeters to square centimeters, we need to divide the area in square millimeters by 100 (since there are 100 square millimeters in a square centimeter).
So, the area of the top of Katrina's laptop in square centimeters would be:
57,000 mm² ÷ 100 = 570 cm²
Therefore, the area of the top of Katrina's laptop in square centimeters is 570 cm².