Here's how to convert 4 meters and 89 centimeters to centimeters:

* Know the conversion: 1 meter (m) = 100 centimeters (cm)

* Convert meters to centimeters: 4 m * 100 cm/m = 400 cm

* Add the remaining centimeters: 400 cm + 89 cm = 489 cm

Therefore, there are 489 cm in 4m and 89cm.