Convert 3500 grams to kilograms.

Step 1 ：Given that 1 kilogram is equal to 1000 grams, we use this ratio to convert grams to kilograms. So, we have \(3500\, \text{grams} \times \frac{1\, \text{kilogram}}{1000\, \text{grams}}\).

Step 2 ：The grams unit cancels out, leaving the answer in kilograms.

Step 3 ：So, the final calculation is \(\frac{3500}{1000}\).