To convert meters to kilometers, you can divide the number of meters by 1,000, since 1 kilometer is equal to 1,000 meters.
Starting with 3.875 × 10^9 meters:
\[ \text{Kilometers} = \frac{3.875 \times 10^9 \text{ meters}}{1,000} \]
\[ = 3.875 \times 10^9 \div 10^3 \]
\[ = 3.875 \times 10^{9-3} \]
\[ = 3.875 \times 10^6 \]
So, 3.875 × 10⁹ meters is equal to 3.875 × 10^6 kilometers.
To express this in decimal notation, it is:
\[ 3.875 \times 10^6 = 3,875,000 \text{ kilometers} \]
Thus, the final answer is 3,875,000 kilometers.