The correct answer is A) kilometers to millimeters.
The other options of the question were B) centimeters to kilometers. C) milligrams to decagrams. D) Â decimeters to hectometers.
The conversion that requires multiplication is kilometers to millimeters.
The millimeter (mm) is 1/1000000 kilometer. It is used in the International metric system. Most countries of the planet use this system. Curiously enough, the United States does not use this system. It uses, inches, yards, and miles. The reference of a kilometer to a mile is the following. One kilometer is 0.621 miles.
