A rectangular board is 1200 millimeters long and 900 millimeters wide. What is the area of the board in square meters?

Hello!
The ratio from millimeters to meters is 1000:1
Therefore we can exchange the length and wide into 1.2 meters and 0.9 meters.
Rectangle area =ab
a=1.2
b=0.9
Rectangle area=1.08
Have a great day!