Answer:
A. 32,100 millimeters
C. 3,210 centimeters
D. 3.21 decameters
Explanation:
1 decimeter is equal to 100 millimeters, 10 centimeters, and 0.01 decameters so you would multiply those numbers by 321 and you get the answers 32,100, 3210, and 3.21.