To convert between metric units, follow these rules:
To convert from a larger unit to a smaller unit, multiply.
To convert from a smaller unit to a larger unit, divide.
Let's try an example. Convert 6 meters to centimeters.
You are going from a larger unit to a smaller unit. Multiply by the number of centimeters in a meter: 100. Let's try another example. Convert 3,000 grams to kilograms.
You are going from a smaller unit to a larger unit. Divide by the number of grams in a kilogram: 1,000. 
