1. The user asked to replace grams (g) with kilograms (kg). 2. Recall that 1 kilogram (kg) equals 1000 grams (g). 3. To convert a mass from grams to kilograms, divide the value in grams by 1000. 4. For example, if you have 500 g, then in kilograms it is $$\frac{500}{1000} = 0.5\text{ kg}$$. 5. This conversion helps to correctly express mass in the desired unit of kilograms instead of grams.