To convert cubic centimeters (cm³) to square centimeters (cm²), you need to divide the volume by the height or depth of the object.
In this case, if you have a cube or rectangular prism with a volume of 850.5 cm³, you would need to know the height or depth of the object to convert it to square centimeters.
For example, if the height of the object is 10 cm, you would divide the volume by the height:
850.5 cm³ ÷ 10 cm = 85.05 cm²
Therefore, 850.5 cm³ is equal to 85.05 cm² if the height of the object is 10 cm.